{"id":34096,"date":"2026-10-16T16:57:08","date_gmt":"2026-10-16T09:57:08","guid":{"rendered":"https:\/\/etest.edu.vn\/?p=34096"},"modified":"2026-10-16T16:57:08","modified_gmt":"2026-10-16T09:57:08","slug":"sat-math-cach-su-dung-bang-tham-chieu-cong-thuc-de-giai-nhanh-cac-cau-hinh-hoc","status":"publish","type":"post","link":"https:\/\/etest.edu.vn\/en\/sat-math-cach-su-dung-bang-tham-chieu-cong-thuc-de-giai-nhanh-cac-cau-hinh-hoc\/","title":{"rendered":"SAT Math: C\u00e1ch S\u1eed D\u1ee5ng B\u1ea3ng Tham Chi\u1ebfu C\u00f4ng Th\u1ee9c \u0110\u1ec3 Gi\u1ea3i Nhanh C\u00e1c C\u00e2u H\u00ecnh H\u1ecdc"},"content":{"rendered":"<p><b>B\u1ea3ng tham chi\u1ebfu c\u00f4ng th\u1ee9c <\/b><a href=\"https:\/\/etest.edu.vn\/en\/sat-math\/\"><b>SAT Math<\/b><\/a><span style=\"font-weight: 400;\"> l\u00e0 m\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 b\u1ecb \u0111\u00e1nh gi\u00e1 th\u1ea5p nh\u1ea5t trong Digital SAT. Ph\u1ea7n l\u1edbn th\u00ed sinh bi\u1ebft r\u1eb1ng Bluebook c\u00f3 s\u1eb5n m\u1ed9t b\u1ea3ng c\u00f4ng th\u1ee9c, nh\u01b0ng r\u1ea5t \u00edt b\u1ea1n th\u1ef1c s\u1ef1 d\u00f9ng n\u00f3 c\u00f3 chi\u1ebfn l\u01b0\u1ee3c: c\u00f3 b\u1ea1n ch\u01b0a t\u1eebng m\u1edf b\u1ea3ng n\u00e0y tr\u01b0\u1edbc ng\u00e0y thi n\u00ean m\u1ea5t th\u1eddi gian t\u00ecm v\u1ecb tr\u00ed, c\u00f3 b\u1ea1n l\u1ea1i ph\u1ee5 thu\u1ed9c v\u00e0o n\u00f3 qu\u00e1 m\u1ee9c, c\u1ee9 g\u1eb7p c\u00e2u h\u00ecnh h\u1ecdc l\u00e0 m\u1edf b\u1ea3ng ra tra t\u1eebng c\u00f4ng th\u1ee9c, khi\u1ebfn th\u1eddi gian l\u00e0m b\u00e0i b\u1ecb k\u00e9o d\u00e0i m\u1ed9t c\u00e1ch kh\u00f4ng c\u1ea7n thi\u1ebft. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u ch\u00ednh x\u00e1c b\u1ea3ng tham chi\u1ebfu cung c\u1ea5p nh\u1eefng g\u00ec v\u00e0 kh\u00f4ng cung c\u1ea5p nh\u1eefng g\u00ec, nh\u1eefng c\u00f4ng th\u1ee9c n\u00e0o n\u00ean thu\u1ed9c l\u00f2ng thay v\u00ec tra, quy tr\u00ecnh 4 b\u01b0\u1edbc \u0111\u1ec3 \u00e1p d\u1ee5ng b\u1ea3ng m\u1ed9t c\u00e1ch nhanh g\u1ecdn v\u00e0o c\u00e1c c\u00e2u h\u00ecnh h\u1ecdc, c\u00f9ng c\u00e1c v\u00ed d\u1ee5 minh h\u1ecda c\u1ee5 th\u1ec3 v\u00e0 nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p c\u1ea7n tr\u00e1nh.<\/span><\/p>\n<figure id=\"attachment_34092\" aria-describedby=\"caption-attachment-34092\" style=\"width: 711px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-34092 size-medium\" src=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/37-711x400.png\" alt=\"\" width=\"711\" height=\"400\" srcset=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/37-711x400.png 711w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/37-1400x788.png 1400w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/37-768x432.png 768w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/37-1536x864.png 1536w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/37-18x10.png 18w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/37.png 1920w\" sizes=\"(max-width: 711px) 100vw, 711px\" \/><figcaption id=\"caption-attachment-34092\" class=\"wp-caption-text\">SAT MATH c\u00e1ch s\u1eed d\u1ee5ng d\u1ee5ng b\u1ea3ng c\u00f4ng th\u1ee9c \u0111\u1ec3 gi\u1ea3i nhanh c\u00e1c c\u00e2u h\u00ecnh th\u1ee9c<\/figcaption><\/figure>\n<h2><b>B\u1ea3ng tham chi\u1ebfu c\u00f4ng th\u1ee9c trong Digital SAT l\u00e0 g\u00ec?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Trong b\u00e0i thi <\/span><a href=\"https:\/\/etest.edu.vn\/en\/khoa-hoc\/luyen-thi-sat\/\"><span style=\"font-weight: 400;\">Digital SAT<\/span><\/a><span style=\"font-weight: 400;\">, \u1ee9ng d\u1ee5ng Bluebook t\u00edch h\u1ee3p s\u1eb5n m\u1ed9t b\u1ea3ng tham chi\u1ebfu (reference sheet) ch\u1ee9a m\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c h\u00ecnh h\u1ecdc v\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n. Th\u00ed sinh c\u00f3 th\u1ec3 m\u1edf b\u1ea3ng n\u00e0y b\u1ea5t k\u1ef3 l\u00fac n\u00e0o trong c\u1ea3 hai module To\u00e1n th\u00f4ng qua bi\u1ec3u t\u01b0\u1ee3ng tham chi\u1ebfu \u1edf ph\u00eda tr\u00ean m\u00e0n h\u00ecnh, v\u00e0 \u0111\u00f3ng l\u1ea1i \u0111\u1ec3 quay v\u1ec1 c\u00e2u h\u1ecfi ch\u1ec9 b\u1eb1ng m\u1ed9t thao t\u00e1c. \u0110i\u1ec1u quan tr\u1ecdng c\u1ea7n hi\u1ec3u ngay t\u1eeb \u0111\u1ea7u l\u00e0 \u0111\u00e2y l\u00e0 b\u1ea3ng <\/span><b>tham chi\u1ebfu<\/b><span style=\"font-weight: 400;\">, kh\u00f4ng ph\u1ea3i b\u1ea3ng <\/span><b>to\u00e0n b\u1ed9 c\u00f4ng th\u1ee9c c\u1ea7n d\u00f9ng<\/b><span style=\"font-weight: 400;\">: n\u00f3 ch\u1ec9 bao g\u1ed3m m\u1ed9t ph\u1ea7n nh\u1ecf trong s\u1ed1 c\u00e1c ki\u1ebfn th\u1ee9c h\u00ecnh h\u1ecdc xu\u1ea5t hi\u1ec7n trong \u0111\u1ec1 thi, v\u00e0 ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 c\u00f4ng th\u1ee9c \u0111\u1ea1i s\u1ed1 hay c\u00e1c c\u00f4ng th\u1ee9c v\u1ec1 \u0111\u01b0\u1eddng th\u1eb3ng, \u0111\u01b0\u1eddng tr\u00f2n tr\u00ean m\u1eb7t ph\u1eb3ng t\u1ecda \u0111\u1ed9.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">M\u1ed9t th\u00f3i quen n\u00ean c\u00f3 l\u00e0 m\u1edf b\u1ea3ng n\u00e0y xem qua m\u1ed9t l\u1ea7n ngay khi b\u1eaft \u0111\u1ea7u m\u1ed7i module To\u00e1n, \u0111\u1ec3 bi\u1ebft r\u00f5 m\u00ecnh c\u00f3 g\u00ec trong tay tr\u01b0\u1edbc khi b\u01b0\u1edbc v\u00e0o l\u00e0m b\u00e0i. Vi\u1ec7c n\u00e0y ch\u1ec9 m\u1ea5t v\u00e0i gi\u00e2y nh\u01b0ng gi\u00fap b\u1ea1n tr\u00e1nh \u0111\u01b0\u1ee3c hai t\u00ecnh hu\u1ed1ng t\u1ed1n k\u00e9m: c\u1ed1 nh\u1edb l\u1ea1i m\u1ed9t c\u00f4ng th\u1ee9c \u0111\u00e3 c\u00f3 s\u1eb5n tr\u00ean b\u1ea3ng, ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i, t\u00ecm ki\u1ebfm tr\u00ean b\u1ea3ng m\u1ed9t c\u00f4ng th\u1ee9c v\u1ed1n kh\u00f4ng h\u1ec1 c\u00f3 \u1edf \u0111\u00f3.<\/span><\/p>\n<h2><b>B\u1ea3ng tham chi\u1ebfu cung c\u1ea5p nh\u1eefng c\u00f4ng th\u1ee9c n\u00e0o?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Ph\u1ea7n h\u00ecnh h\u1ecdc c\u1ee7a b\u1ea3ng tham chi\u1ebfu t\u1eadp trung v\u00e0o c\u00e1c h\u00ecnh c\u01a1 b\u1ea3n v\u00e0 m\u1ed9t s\u1ed1 quan h\u1ec7 g\u00f3c, \u0111\u01b0\u1ee3c chia th\u00e0nh ba nh\u00f3m sau.<\/span><\/p>\n<h3><b>C\u00f4ng th\u1ee9c h\u00ecnh ph\u1eb3ng v\u00e0 tam gi\u00e1c<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u1ea3ng cung c\u1ea5p c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch v\u00e0 chu vi h\u00ecnh tr\u00f2n (A = \u03c0r\u00b2 v\u00e0 C = 2\u03c0r), di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt (A = \u2113w) v\u00e0 di\u1ec7n t\u00edch tam gi\u00e1c (A = \u00bdbh). B\u00ean c\u1ea1nh \u0111\u00f3 l\u00e0 \u0111\u1ecbnh l\u00fd Pythagore (c\u00b2 = a\u00b2 + b\u00b2) c\u00f9ng t\u1ec9 l\u1ec7 c\u1ea1nh c\u1ee7a hai lo\u1ea1i tam gi\u00e1c vu\u00f4ng \u0111\u1eb7c bi\u1ec7t: tam gi\u00e1c 30\u00b0-60\u00b0-90\u00b0 (c\u00e1c c\u1ea1nh theo t\u1ec9 l\u1ec7 x : x\u221a3 : 2x) v\u00e0 tam gi\u00e1c 45\u00b0-45\u00b0-90\u00b0 (c\u00e1c c\u1ea1nh theo t\u1ec9 l\u1ec7 x : x : x\u221a2).<\/span><\/p>\n<h3><b>C\u00f4ng th\u1ee9c th\u1ec3 t\u00edch h\u00ecnh kh\u1ed1i<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u1ea3ng li\u1ec7t k\u00ea c\u00f4ng th\u1ee9c th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt (V = \u2113wh), h\u00ecnh tr\u1ee5 (V = \u03c0r\u00b2h), h\u00ecnh c\u1ea7u (V = 4\/3 \u03c0r\u00b3), h\u00ecnh n\u00f3n (V = 1\/3 \u03c0r\u00b2h) v\u00e0 h\u00ecnh ch\u00f3p \u0111\u00e1y vu\u00f4ng (V = 1\/3 \u2113wh).<\/span><\/p>\n<h3><b>C\u00e1c d\u1eef ki\u1ec7n v\u1ec1 g\u00f3c<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">B\u1ea3ng c\u0169ng nh\u1eafc l\u1ea1i nh\u1eefng th\u00f4ng tin n\u1ec1n t\u1ea3ng: m\u1ed9t v\u00f2ng tr\u00f2n c\u00f3 360 \u0111\u1ed9 (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 2\u03c0 radian) v\u00e0 t\u1ed5ng ba g\u00f3c trong m\u1ed9t tam gi\u00e1c b\u1eb1ng 180 \u0111\u1ed9.<\/span><\/p>\n<h2><b>Nh\u1eefng c\u00f4ng th\u1ee9c KH\u00d4NG c\u00f3 trong b\u1ea3ng tham chi\u1ebfu<\/b><\/h2>\n<figure id=\"attachment_34093\" aria-describedby=\"caption-attachment-34093\" style=\"width: 711px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-34093 size-medium\" src=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/38-711x400.png\" alt=\"\" width=\"711\" height=\"400\" srcset=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/38-711x400.png 711w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/38-1400x788.png 1400w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/38-768x432.png 768w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/38-1536x864.png 1536w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/38-18x10.png 18w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/38.png 1920w\" sizes=\"(max-width: 711px) 100vw, 711px\" \/><figcaption id=\"caption-attachment-34093\" class=\"wp-caption-text\">Nh\u1eefng c\u00f4ng th\u1ee9c kh\u00f4ng c\u00f3 trong b\u1ea3ng tham chi\u1ebfu<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 ph\u1ea7n nhi\u1ec1u th\u00ed sinh b\u1ecf s\u00f3t nh\u1ea5t, v\u00e0 c\u0169ng l\u00e0 n\u01a1i d\u1ec5 m\u1ea5t \u0111i\u1ec3m nh\u1ea5t. Theo c\u00e1c ngu\u1ed3n t\u1ed5ng h\u1ee3p v\u1ec1 b\u1ea3ng c\u00f4ng th\u1ee9c Digital SAT, nh\u1eefng n\u1ed9i dung sau kh\u00f4ng n\u1eb1m trong b\u1ea3ng v\u00e0 b\u1ea1n c\u1ea7n ch\u1ee7 \u0111\u1ed9ng ghi nh\u1edb:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c chu vi c\u00e1c h\u00ecnh kh\u00e1c ngo\u00e0i h\u00ecnh tr\u00f2n v\u00e0 di\u1ec7n t\u00edch xung quanh, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n c\u1ee7a h\u00ecnh kh\u1ed1i (surface area).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u0110\u1ed9 d\u00e0i cung (arc length) v\u00e0 di\u1ec7n t\u00edch h\u00ecnh qu\u1ea1t tr\u00f2n (sector area), v\u1ed1n th\u01b0\u1eddng \u0111\u01b0\u1ee3c gi\u1ea3i b\u1eb1ng c\u00e1ch l\u1ea5y t\u1ec9 l\u1ec7 g\u00f3c \u1edf t\u00e2m tr\u00ean 360\u00b0.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c t\u1ec9 s\u1ed1 l\u01b0\u1ee3ng gi\u00e1c sin, cos, tan trong tam gi\u00e1c vu\u00f4ng (quy t\u1eafc SOH-CAH-TOA).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng tr\u00f2n tr\u00ean m\u1eb7t ph\u1eb3ng t\u1ecda \u0111\u1ed9, (x \u2212 h)\u00b2 + (y \u2212 k)\u00b2 = r\u00b2.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m v\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">C\u00e1c c\u00f4ng th\u1ee9c \u0111\u1ea1i s\u1ed1 nh\u01b0 nghi\u1ec7m ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc hai, d\u1ea1ng \u0111\u1ec9nh c\u1ee7a parabol, quy t\u1eafc l\u0169y th\u1eeba.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">V\u00ec n\u1ed9i dung chi ti\u1ebft c\u1ee7a b\u1ea3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c College Board \u0111i\u1ec1u ch\u1ec9nh theo t\u1eebng giai \u0111o\u1ea1n, c\u00e1ch an to\u00e0n nh\u1ea5t l\u00e0 m\u1edf b\u1ea3ng tham chi\u1ebfu ngay trong c\u00e1c b\u00e0i thi th\u1eed Bluebook \u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu v\u1edbi danh s\u00e1ch tr\u00ean, thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o tr\u00ed nh\u1edb ho\u1eb7c m\u1ed9t ngu\u1ed3n duy nh\u1ea5t.<\/span><\/p>\n<h2><b>C\u00f4ng th\u1ee9c n\u00e0o n\u00ean thu\u1ed9c l\u00f2ng, c\u00f4ng th\u1ee9c n\u00e0o n\u00ean \u0111\u1ec3 d\u00e0nh cho b\u1ea3ng?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Vi\u1ec7c m\u1edf b\u1ea3ng, t\u00ecm c\u00f4ng th\u1ee9c, \u0111\u1ed1i chi\u1ebfu r\u1ed3i quay l\u1ea1i c\u00e2u h\u1ecfi t\u1ed1n kho\u1ea3ng v\u00e0i gi\u00e2y m\u1ed7i l\u1ea7n. Con s\u1ed1 n\u00e0y nghe nh\u1ecf, nh\u01b0ng n\u1ebfu l\u1eb7p l\u1ea1i \u1edf nhi\u1ec1u c\u00e2u h\u00ecnh h\u1ecdc th\u00ec t\u1ed5ng th\u1eddi gian ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c khi thu\u1ed9c l\u00f2ng c\u00f4ng th\u1ee9c l\u00e0 \u0111\u00e1ng k\u1ec3. Nguy\u00ean t\u1eafc ph\u00e2n b\u1ed5 h\u1ee3p l\u00fd l\u00e0 chia c\u00f4ng th\u1ee9c th\u00e0nh hai nh\u00f3m.<\/span><\/p>\n<h3><b>Nh\u00f3m n\u00ean thu\u1ed9c l\u00f2ng<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 nh\u1eefng c\u00f4ng th\u1ee9c xu\u1ea5t hi\u1ec7n th\u01b0\u1eddng xuy\u00ean nh\u1ea5t v\u00e0 d\u00f9ng \u0111\u01b0\u1ee3c trong r\u1ea5t nhi\u1ec1u d\u1ea1ng b\u00e0i kh\u00e1c nhau: di\u1ec7n t\u00edch v\u00e0 chu vi h\u00ecnh tr\u00f2n, di\u1ec7n t\u00edch tam gi\u00e1c, \u0111\u1ecbnh l\u00fd Pythagore v\u00e0 hai t\u1ec9 l\u1ec7 tam gi\u00e1c vu\u00f4ng \u0111\u1eb7c bi\u1ec7t. Ngo\u00e0i ra, c\u00e1c c\u00f4ng th\u1ee9c n\u1eb1m ngo\u00e0i b\u1ea3ng nh\u01b0 ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng tr\u00f2n, kho\u1ea3ng c\u00e1ch v\u00e0 trung \u0111i\u1ec3m, t\u1ec9 s\u1ed1 l\u01b0\u1ee3ng gi\u00e1c, \u0111\u1ed9 d\u00e0i cung v\u00e0 di\u1ec7n t\u00edch h\u00ecnh qu\u1ea1t b\u1eaft bu\u1ed9c ph\u1ea3i thu\u1ed9c, v\u00ec b\u1ea1n kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o tra c\u1ee9u ch\u00fang trong l\u00fac l\u00e0m b\u00e0i.<\/span><\/p>\n<h3><b>Nh\u00f3m c\u00f3 th\u1ec3 \u0111\u1ec3 d\u00e0nh cho b\u1ea3ng<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e1c c\u00f4ng th\u1ee9c th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh c\u1ea7u, h\u00ecnh n\u00f3n v\u00e0 h\u00ecnh ch\u00f3p \u00edt xu\u1ea5t hi\u1ec7n h\u01a1n v\u00e0 kh\u00f3 nh\u1edb ch\u00ednh x\u00e1c h\u1ec7 s\u1ed1 (4\/3, 1\/3). V\u1edbi nh\u1eefng c\u00f4ng th\u1ee9c n\u00e0y, b\u1ea1n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o b\u1ea3ng \u0111\u1ec3 ki\u1ec3m tra, mi\u1ec5n l\u00e0 \u0111\u00e3 nh\u1eadn di\u1ec7n \u0111\u00fang h\u00ecnh kh\u1ed1i trong c\u00e2u h\u1ecfi.<\/span><\/p>\n<h2><b>Quy tr\u00ecnh 4 b\u01b0\u1edbc \u0111\u1ec3 d\u00f9ng b\u1ea3ng tham chi\u1ebfu gi\u1ea3i nhanh c\u00e2u h\u00ecnh h\u1ecdc<\/b><\/h2>\n<figure id=\"attachment_34094\" aria-describedby=\"caption-attachment-34094\" style=\"width: 711px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-34094 size-medium\" src=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/39-711x400.png\" alt=\"\" width=\"711\" height=\"400\" srcset=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/39-711x400.png 711w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/39-1400x788.png 1400w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/39-768x432.png 768w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/39-1536x864.png 1536w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/39-18x10.png 18w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/39.png 1920w\" sizes=\"(max-width: 711px) 100vw, 711px\" \/><figcaption id=\"caption-attachment-34094\" class=\"wp-caption-text\">Quy tr\u00ecnh 4 b\u01b0\u1edbc gi\u1ea3i nhanh ph\u1ea7n h\u00ecnh h\u1ecdc trong SAT<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 vi\u1ec7c d\u00f9ng b\u1ea3ng th\u1ef1c s\u1ef1 gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian thay v\u00ec t\u1ea1o th\u00eam m\u1ed9t b\u01b0\u1edbc th\u1eeba, h\u00e3y \u00e1p d\u1ee5ng quy tr\u00ecnh c\u00f3 h\u1ec7 th\u1ed1ng sau cho m\u1ecdi c\u00e2u h\u00ecnh h\u1ecdc.<\/span><\/p>\n<h3><b>B\u01b0\u1edbc 1: Nh\u1eadn di\u1ec7n h\u00ecnh v\u00e0 x\u00e1c \u0111\u1ecbnh \u0111\u1ea1i l\u01b0\u1ee3ng c\u1ea7n t\u00ecm<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Tr\u01b0\u1edbc khi nh\u00ecn v\u00e0o b\u1ea3ng, h\u00e3y x\u00e1c \u0111\u1ecbnh c\u00e2u h\u1ecfi \u0111ang n\u00f3i v\u1ec1 h\u00ecnh g\u00ec (h\u00ecnh tr\u1ee5, n\u00f3n, c\u1ea7u, tam gi\u00e1c vu\u00f4ng&#8230;) v\u00e0 \u0111\u1ec1 b\u00e0i y\u00eau c\u1ea7u t\u00ecm \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0o (th\u1ec3 t\u00edch, b\u00e1n k\u00ednh, chi\u1ec1u cao, \u0111\u1ed9 d\u00e0i c\u1ea1nh). Vi\u1ec7c bi\u1ebft \u0111\u00fang t\u00ean h\u00ecnh kh\u1ed1i l\u00e0 \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 t\u00ecm \u0111\u00fang c\u00f4ng th\u1ee9c trong b\u1ea3ng, n\u00ean c\u1ea7n n\u1eafm v\u1eefng t\u00ean g\u1ecdi ti\u1ebfng Anh c\u1ee7a c\u00e1c h\u00ecnh: cylinder, cone, sphere, pyramid, rectangular prism.<\/span><\/p>\n<h3><b>B\u01b0\u1edbc 2: Ch\u1ecdn c\u00f4ng th\u1ee9c v\u00e0 vi\u1ebft ra gi\u1ea5y nh\u00e1p<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">N\u1ebfu c\u00f4ng th\u1ee9c n\u1eb1m trong nh\u00f3m \u0111\u00e3 thu\u1ed9c, h\u00e3y vi\u1ebft th\u1eb3ng ra gi\u1ea5y nh\u00e1p. N\u1ebfu kh\u00f4ng, m\u1edf b\u1ea3ng tham chi\u1ebfu, t\u00ecm \u0111\u00fang h\u00ecnh kh\u1ed1i v\u00e0 ch\u00e9p c\u00f4ng th\u1ee9c ra gi\u1ea5y. Vi\u1ec7c vi\u1ebft ra gi\u1ea5y gi\u00fap b\u1ea1n kh\u00f4ng ph\u1ea3i m\u1edf l\u1ea1i b\u1ea3ng l\u1ea7n th\u1ee9 hai gi\u1eefa ch\u1eebng v\u00e0 gi\u1ea3m nguy c\u01a1 ch\u00e9p sai h\u1ec7 s\u1ed1 khi thay s\u1ed1.<\/span><\/p>\n<h3><b>B\u01b0\u1edbc 3: Chu\u1ea9n h\u00f3a d\u1eef ki\u1ec7n tr\u01b0\u1edbc khi thay s\u1ed1<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 b\u01b0\u1edbc nhi\u1ec1u th\u00ed sinh b\u1ecf qua v\u00e0 m\u1ea5t \u0111i\u1ec3m oan. H\u00e3y ki\u1ec3m tra xem \u0111\u1ec1 cho b\u00e1n k\u00ednh hay \u0111\u01b0\u1eddng k\u00ednh, c\u00e1c \u0111\u01a1n v\u1ecb \u0111o c\u00f3 \u0111\u1ed3ng nh\u1ea5t hay kh\u00f4ng, v\u00e0 \u0111\u00e1p \u00e1n y\u00eau c\u1ea7u bi\u1ec3u di\u1ec5n theo \u03c0 hay theo s\u1ed1 th\u1eadp ph\u00e2n. Ch\u1ec9 khi d\u1eef ki\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a, b\u1ea1n m\u1edbi thay v\u00e0o c\u00f4ng th\u1ee9c.<\/span><\/p>\n<h3><b>B\u01b0\u1edbc 4: Thay s\u1ed1, gi\u1ea3i v\u00e0 ki\u1ec3m tra t\u00ednh h\u1ee3p l\u00fd<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Sau khi t\u00ednh ra k\u1ebft qu\u1ea3, h\u00e3y d\u00e0nh v\u00e0i gi\u00e2y \u0111\u00e1nh gi\u00e1 xem con s\u1ed1 c\u00f3 h\u1ee3p l\u00fd hay kh\u00f4ng: c\u1ea1nh huy\u1ec1n c\u1ee7a tam gi\u00e1c vu\u00f4ng ph\u1ea3i d\u00e0i h\u01a1n c\u1ea1nh g\u00f3c vu\u00f4ng, th\u1ec3 t\u00edch h\u00ecnh n\u00f3n ph\u1ea3i nh\u1ecf h\u01a1n th\u1ec3 t\u00edch h\u00ecnh tr\u1ee5 c\u00f9ng \u0111\u00e1y v\u00e0 c\u00f9ng chi\u1ec1u cao. B\u01b0\u1edbc ki\u1ec3m tra nhanh n\u00e0y gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i ch\u00e9p sai h\u1ec7 s\u1ed1 ho\u1eb7c nh\u1ea7m \u0111\u1ea1i l\u01b0\u1ee3ng.<\/span><\/p>\n<h2><b>V\u00ed d\u1ee5 minh h\u1ecda: \u00e1p d\u1ee5ng b\u1ea3ng tham chi\u1ebfu v\u00e0o t\u1eebng d\u1ea1ng c\u00e2u h\u1ecfi<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">C\u00e1c v\u00ed d\u1ee5 d\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u00e0i t\u1eadp t\u1ef1 x\u00e2y d\u1ef1ng \u0111\u1ec3 minh h\u1ecda quy tr\u00ecnh, kh\u00f4ng ph\u1ea3i \u0111\u1ec1 thi th\u1eadt.<\/span><\/p>\n<h3><b>V\u00ed d\u1ee5 1: C\u00e2u h\u1ecfi v\u1ec1 h\u00ecnh n\u00f3n<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t h\u00ecnh n\u00f3n c\u00f3 b\u00e1n k\u00ednh \u0111\u00e1y 6 v\u00e0 chi\u1ec1u cao 9. Th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh n\u00f3n l\u00e0 bao nhi\u00eau?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">H\u00ecnh n\u00f3n c\u00f3 c\u00f4ng th\u1ee9c V = 1\/3 \u03c0r\u00b2h, \u0111\u00e2y l\u00e0 c\u00f4ng th\u1ee9c kh\u00f3 nh\u1edb h\u1ec7 s\u1ed1 n\u00ean l\u1ea5y t\u1eeb b\u1ea3ng. Thay s\u1ed1: V = 1\/3 \u00d7 \u03c0 \u00d7 6\u00b2 \u00d7 9 = 1\/3 \u00d7 \u03c0 \u00d7 36 \u00d7 9 = 108\u03c0. Ki\u1ec3m tra t\u00ednh h\u1ee3p l\u00fd: n\u1ebfu l\u00e0 h\u00ecnh tr\u1ee5 c\u00f9ng k\u00edch th\u01b0\u1edbc th\u00ec th\u1ec3 t\u00edch l\u00e0 \u03c0 \u00d7 36 \u00d7 9 = 324\u03c0, v\u00e0 108\u03c0 \u0111\u00fang b\u1eb1ng m\u1ed9t ph\u1ea7n ba c\u1ee7a con s\u1ed1 \u0111\u00f3, ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a h\u00ecnh n\u00f3n.<\/span><\/p>\n<h3><b>V\u00ed d\u1ee5 2: T\u00ecm \u0111\u1ea1i l\u01b0\u1ee3ng ch\u01b0a bi\u1ebft t\u1eeb th\u1ec3 t\u00edch<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t h\u00ecnh tr\u1ee5 c\u00f3 th\u1ec3 t\u00edch 90\u03c0 v\u00e0 b\u00e1n k\u00ednh \u0111\u00e1y 3. Chi\u1ec1u cao c\u1ee7a h\u00ecnh tr\u1ee5 l\u00e0 bao nhi\u00eau?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u1edbi V = \u03c0r\u00b2h, ta c\u00f3 90\u03c0 = \u03c0 \u00d7 3\u00b2 \u00d7 h = 9\u03c0h, suy ra h = 10. \u1ede d\u1ea1ng b\u00e0i n\u00e0y, b\u1ea3ng ch\u1ec9 cung c\u1ea5p c\u00f4ng th\u1ee9c xu\u00f4i; vi\u1ec7c bi\u1ebfn \u0111\u1ed5i \u0111\u1ec3 t\u00ecm \u0111\u1ea1i l\u01b0\u1ee3ng c\u1ea7n t\u00ecm l\u00e0 ph\u1ea7n th\u00ed sinh ph\u1ea3i t\u1ef1 l\u00e0m. N\u1ebfu th\u1ea5y ph\u00e9p bi\u1ebfn \u0111\u1ed5i ph\u1ee9c t\u1ea1p h\u01a1n, b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadp ph\u01b0\u01a1ng tr\u00ecnh v\u00e0o Desmos \u0111\u1ec3 gi\u1ea3i tr\u1ef1c ti\u1ebfp thay v\u00ec t\u00ednh tay.<\/span><\/p>\n<h3><b>V\u00ed d\u1ee5 3: Tam gi\u00e1c vu\u00f4ng \u0111\u1eb7c bi\u1ec7t<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Trong m\u1ed9t tam gi\u00e1c 30\u00b0-60\u00b0-90\u00b0, c\u1ea1nh ng\u1eafn nh\u1ea5t (\u0111\u1ed1i di\u1ec7n g\u00f3c 30\u00b0) d\u00e0i 5. T\u00ednh \u0111\u1ed9 d\u00e0i c\u1ea1nh huy\u1ec1n v\u00e0 c\u1ea1nh g\u00f3c vu\u00f4ng c\u00f2n l\u1ea1i.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Theo t\u1ec9 l\u1ec7 x : x\u221a3 : 2x v\u1edbi x = 5, c\u1ea1nh g\u00f3c vu\u00f4ng c\u00f2n l\u1ea1i l\u00e0 5\u221a3 v\u00e0 c\u1ea1nh huy\u1ec1n l\u00e0 10. N\u1ebfu thu\u1ed9c t\u1ec9 l\u1ec7 n\u00e0y, b\u1ea1n kh\u00f4ng c\u1ea7n m\u1edf b\u1ea3ng v\u00e0 c\u0169ng kh\u00f4ng ph\u1ea3i d\u00f9ng \u0111\u1ecbnh l\u00fd Pythagore \u0111\u1ec3 t\u00ednh, ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 th\u1eddi gian so v\u1edbi vi\u1ec7c gi\u1ea3i tay.<\/span><\/p>\n<h3><b>V\u00ed d\u1ee5 4: B\u1eaby b\u00e1n k\u00ednh v\u00e0 \u0111\u01b0\u1eddng k\u00ednh<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t h\u00ecnh tr\u00f2n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 10. Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh tr\u00f2n l\u00e0 bao nhi\u00eau?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 b\u1eaby ph\u1ed5 bi\u1ebfn: nhi\u1ec1u b\u1ea1n thay lu\u00f4n 10 v\u00e0o c\u00f4ng th\u1ee9c A = \u03c0r\u00b2 v\u00e0 ra 100\u03c0, trong khi b\u00e1n k\u00ednh th\u1ef1c t\u1ebf l\u00e0 5, n\u00ean A = \u03c0 \u00d7 5\u00b2 = 25\u03c0. Ch\u00ednh v\u00ec v\u1eady b\u01b0\u1edbc chu\u1ea9n h\u00f3a d\u1eef ki\u1ec7n \u1edf B\u01b0\u1edbc 3 l\u00e0 \u0111i\u1ec3m then ch\u1ed1t, kh\u00f4ng th\u1ec3 b\u1ecf qua d\u00f9 b\u1ea1n \u0111\u00e3 nh\u1edb \u0111\u00fang c\u00f4ng th\u1ee9c.<\/span><\/p>\n<h3><b>V\u00ed d\u1ee5 5: Thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc v\u00e0 quan h\u1ec7 t\u1ec9 l\u1ec7<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">N\u1ebfu b\u00e1n k\u00ednh c\u1ee7a m\u1ed9t h\u00ecnh c\u1ea7u t\u0103ng g\u1ea5p \u0111\u00f4i th\u00ec th\u1ec3 t\u00edch t\u0103ng bao nhi\u00eau l\u1ea7n?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u00ec th\u1ec3 t\u00edch h\u00ecnh c\u1ea7u t\u1ec9 l\u1ec7 v\u1edbi r\u00b3, khi b\u00e1n k\u00ednh t\u0103ng g\u1ea5p \u0111\u00f4i th\u00ec th\u1ec3 t\u00edch t\u0103ng 2\u00b3 = 8 l\u1ea7n. V\u1edbi d\u1ea1ng c\u00e2u h\u1ecfi t\u1ec9 l\u1ec7 n\u00e0y, b\u1ea1n th\u01b0\u1eddng kh\u00f4ng c\u1ea7n thay s\u1ed1 c\u1ee5 th\u1ec3 m\u00e0 ch\u1ec9 c\u1ea7n n\u1eafm c\u1ea5u tr\u00fac c\u00f4ng th\u1ee9c (r m\u0169 m\u1ea5y), n\u00ean vi\u1ec7c hi\u1ec3u b\u1ea3n ch\u1ea5t c\u00f4ng th\u1ee9c gi\u00fap gi\u1ea3i nhanh h\u01a1n nhi\u1ec1u so v\u1edbi vi\u1ec7c tra b\u1ea3ng r\u1ed3i t\u00ednh to\u00e1n.<\/span><\/p>\n<h2><b>K\u1ebft h\u1ee3p b\u1ea3ng tham chi\u1ebfu v\u1edbi Desmos \u0111\u1ec3 t\u0103ng t\u1ed1c<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Digital SAT cho ph\u00e9p d\u00f9ng m\u00e1y t\u00ednh \u0111\u1ed3 th\u1ecb Desmos trong to\u00e0n b\u1ed9 ph\u1ea7n To\u00e1n, v\u00e0 \u0111\u00e2y l\u00e0 c\u00f4ng c\u1ee5 b\u1ed5 tr\u1ee3 r\u1ea5t t\u1ed1t cho c\u00e1c c\u00e2u h\u00ecnh h\u1ecdc. Khi ph\u01b0\u01a1ng tr\u00ecnh sau khi thay s\u1ed1 c\u00f3 \u1ea9n \u1edf nh\u1eefng v\u1ecb tr\u00ed kh\u00f3 bi\u1ebfn \u0111\u1ed5i (v\u00ed d\u1ee5 \u1ea9n n\u1eb1m trong l\u0169y th\u1eeba ho\u1eb7c c\u0103n th\u1ee9c), b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadp tr\u1ef1c ti\u1ebfp ph\u01b0\u01a1ng tr\u00ecnh v\u00e0o Desmos v\u00e0 \u0111\u1ecdc nghi\u1ec7m thay v\u00ec gi\u1ea3i tay. Ngo\u00e0i ra, Desmos gi\u00fap b\u1ea1n ki\u1ec3m tra nhanh c\u00e1c ph\u00e9p t\u00ednh v\u1edbi \u03c0 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n, gi\u1ea3m r\u1ee7i ro sai s\u00f3t khi t\u00ednh nh\u1ea9m.<\/span><\/p>\n<h2><b>Nh\u1eefng l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi d\u00f9ng b\u1ea3ng tham chi\u1ebfu<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">L\u1ed7i \u0111\u1ea7u ti\u00ean l\u00e0 l\u1ec7 thu\u1ed9c qu\u00e1 m\u1ee9c v\u00e0o b\u1ea3ng: m\u1edf b\u1ea3ng \u1edf m\u1ecdi c\u00e2u h\u00ecnh h\u1ecdc d\u00f9 c\u00f4ng th\u1ee9c r\u1ea5t quen thu\u1ed9c, khi\u1ebfn t\u1ed5ng th\u1eddi gian l\u00e0m b\u00e0i b\u1ecb k\u00e9o d\u00e0i. L\u1ed7i th\u1ee9 hai l\u00e0 m\u1edf b\u1ea3ng qu\u00e1 mu\u1ed9n ho\u1eb7c ch\u01b0a t\u1eebng l\u00e0m quen tr\u01b0\u1edbc ng\u00e0y thi, d\u1eabn \u0111\u1ebfn l\u00fang t\u00fang v\u1edbi v\u1ecb tr\u00ed v\u00e0 c\u00e1ch thao t\u00e1c. L\u1ed7i th\u1ee9 ba l\u00e0 nh\u1ea7m c\u00f4ng th\u1ee9c gi\u1eefa c\u00e1c h\u00ecnh kh\u1ed1i c\u00f3 t\u00ean g\u1ecdi g\u1ea7n nhau, \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u00ecnh n\u00f3n v\u00e0 h\u00ecnh ch\u00f3p, ho\u1eb7c qu\u00ean h\u1ec7 s\u1ed1 1\/3. L\u1ed7i th\u1ee9 t\u01b0 l\u00e0 b\u1ecf qua b\u01b0\u1edbc chu\u1ea9n h\u00f3a d\u1eef ki\u1ec7n, nh\u1ea5t l\u00e0 nh\u1ea7m b\u00e1n k\u00ednh v\u1edbi \u0111\u01b0\u1eddng k\u00ednh, ho\u1eb7c kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t \u0111\u01a1n v\u1ecb \u0111o. Cu\u1ed1i c\u00f9ng, nhi\u1ec1u b\u1ea1n t\u01b0\u1edfng r\u1eb1ng b\u1ea3ng bao g\u1ed3m c\u1ea3 c\u00e1c c\u00f4ng th\u1ee9c v\u1ec1 t\u1ecda \u0111\u1ed9 hay l\u01b0\u1ee3ng gi\u00e1c n\u00ean kh\u00f4ng \u00f4n t\u1eadp c\u00e1c n\u1ed9i dung n\u00e0y, \u0111\u1ebfn khi g\u1eb7p c\u00e2u h\u1ecfi m\u1edbi nh\u1eadn ra m\u00ecnh kh\u00f4ng c\u00f3 c\u00f4ng th\u1ee9c n\u00e0o \u0111\u1ec3 d\u1ef1a v\u00e0o.<\/span><\/p>\n<h2><b>Luy\u1ec7n t\u1eadp th\u1ebf n\u00e0o \u0111\u1ec3 d\u00f9ng b\u1ea3ng tham chi\u1ebfu th\u1eadt nhanh?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">C\u00e1ch luy\u1ec7n hi\u1ec7u qu\u1ea3 nh\u1ea5t l\u00e0 th\u1ef1c h\u00e0nh ngay tr\u00ean c\u00e1c b\u00e0i thi th\u1eed c\u1ee7a \u1ee9ng d\u1ee5ng Bluebook, v\u00ec \u0111\u00e2y l\u00e0 m\u00f4i tr\u01b0\u1eddng m\u00f4 ph\u1ecfng \u0111\u00fang v\u1ecb tr\u00ed v\u00e0 c\u00e1ch thao t\u00e1c c\u1ee7a b\u1ea3ng tham chi\u1ebfu trong b\u00e0i thi th\u1eadt. Sau m\u1ed7i b\u00e0i thi th\u1eed, h\u00e3y ghi l\u1ea1i nh\u1eefng c\u00e2u h\u00ecnh h\u1ecdc b\u1ea1n ph\u1ea3i m\u1edf b\u1ea3ng v\u00e0 nh\u1eefng c\u00e2u b\u1ea1n l\u00e0m sai v\u00ec nh\u1ea7m c\u00f4ng th\u1ee9c, r\u1ed3i l\u1eadp th\u00e0nh danh s\u00e1ch \u00f4n t\u1eadp ri\u00eang cho nh\u1eefng c\u00f4ng th\u1ee9c \u0111\u00f3. M\u1ed9t c\u00e1ch kh\u00e1c l\u00e0 t\u1ef1 l\u1eadp &#8220;b\u1ea3ng c\u00f4ng th\u1ee9c b\u1ed5 sung&#8221; cho nh\u1eefng n\u1ed9i dung kh\u00f4ng c\u00f3 trong b\u1ea3ng ch\u00ednh th\u1ee9c (ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng tr\u00f2n, kho\u1ea3ng c\u00e1ch, trung \u0111i\u1ec3m, l\u01b0\u1ee3ng gi\u00e1c, \u0111\u1ed9 d\u00e0i cung, di\u1ec7n t\u00edch h\u00ecnh qu\u1ea1t) v\u00e0 \u00f4n l\u1ea1i th\u01b0\u1eddng xuy\u00ean cho \u0111\u1ebfn khi nh\u1edb ngay c\u1ea3 khi kh\u00f4ng nh\u00ecn t\u00e0i li\u1ec7u.<\/span><\/p>\n<h2><b>N\u01a1i h\u1ecdc SAT v\u00e0 l\u00e0m h\u1ed3 s\u01a1 du h\u1ecdc uy t\u00edn t\u1ea1i TH. HCM?<\/b><\/h2>\n<figure id=\"attachment_34088\" aria-describedby=\"caption-attachment-34088\" style=\"width: 711px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"wp-image-34088 size-medium\" src=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/33-1-711x400.png\" alt=\"\" width=\"711\" height=\"400\" srcset=\"https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/33-1-711x400.png 711w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/33-1-1400x788.png 1400w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/33-1-768x432.png 768w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/33-1-1536x864.png 1536w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/33-1-18x10.png 18w, https:\/\/etest.edu.vn\/wp-content\/uploads\/2026\/10\/33-1.png 1920w\" sizes=\"(max-width: 711px) 100vw, 711px\" \/><figcaption id=\"caption-attachment-34088\" class=\"wp-caption-text\">\u0110\u1ecba \u0111i\u1ec3m h\u1ecdc IELTS &amp; SAT uy t\u00edn t\u1ea1i TP.HCM<\/figcaption><\/figure>\n<p><a href=\"https:\/\/etest.edu.vn\/en\/\"><span style=\"font-weight: 400;\">ETEST <\/span><\/a><span style=\"font-weight: 400;\">l\u00e0 trung t\u00e2m luy\u1ec7n thi SAT v\u1edbi <\/span><a href=\"https:\/\/etest.edu.vn\/en\/doi-ngu-giao-vien\/\"><span style=\"font-weight: 400;\">\u0111\u1ed9i ng\u0169 gi\u00e1o vi\u00ean gi\u00e0u kinh nghi\u1ec7m<\/span><\/a><span style=\"font-weight: 400;\">, \u0111\u1ed3ng h\u00e0nh c\u00f9ng h\u1ecdc sinh kh\u00f4ng ch\u1ec9 trong vi\u1ec7c n\u00e2ng cao \u0111i\u1ec3m s\u1ed1 m\u00e0 c\u00f2n t\u01b0 v\u1ea5n chi\u1ebfn l\u01b0\u1ee3c thi v\u00e0 g\u1eedi \u0111i\u1ec3m ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng tr\u01b0\u1eddng m\u1ee5c ti\u00eau. V\u1edbi l\u1ed9 tr\u00ecnh h\u1ecdc \u0111\u01b0\u1ee3c c\u00e1 nh\u00e2n h\u00f3a v\u00e0 n\u1ec1n t\u1ea3ng luy\u1ec7n thi m\u00f4 ph\u1ecfng s\u00e1t \u0111\u1ec1 thi th\u1eadt, ETEST gi\u00fap h\u1ecdc sinh t\u1ef1 tin \u0111\u1ea1t \u0111i\u1ec3m SAT mong mu\u1ed1n v\u00e0 x\u00e2y d\u1ef1ng h\u1ed3 s\u01a1 du h\u1ecdc hi\u1ec7u qu\u1ea3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh SAT, ETEST c\u00f2n c\u00f3 l\u1ed9 tr\u00ecnh h\u1ecdc <\/span><a href=\"https:\/\/etest.edu.vn\/en\/khoa-hoc\/luyen-thi-ielts\/\"><span style=\"font-weight: 400;\">IELTS <\/span><\/a><span style=\"font-weight: 400;\">\u00a0\u0111\u01b0\u1ee3c c\u00e1 nh\u00e2n h\u00f3a theo \u0111\u00fang m\u1ee5c ti\u00eau c\u1ee7a t\u1eebng h\u1ecdc vi\u00ean cho c\u1ea3 4 k\u1ef9 n\u0103ng tron (<\/span><a href=\"https:\/\/etest.edu.vn\/en\/ielts-listening\/\"><span style=\"font-weight: 400;\">Listen<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/etest.edu.vn\/en\/ielts-reading\/\"><span style=\"font-weight: 400;\">\u0110\u1ecdc<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/etest.edu.vn\/en\/ielts-writing-category\/\"><span style=\"font-weight: 400;\">Write<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/etest.edu.vn\/en\/ielts-speaking\/\"><span style=\"font-weight: 400;\">Speak<\/span><\/a><span style=\"font-weight: 400;\">). Ngo\u00e0i ra, b\u1ea1n c\u00f3 nhu c\u1ea7u \u00f4n luy\u1ec7n ti\u1ebfng anh ph\u1ee5c v\u1ee5 <\/span><a href=\"https:\/\/duhoc-etest.edu.vn\/\"><span style=\"font-weight: 400;\">du h\u1ecdc<\/span><\/a><span style=\"font-weight: 400;\"> cho m\u1ee5c ti\u00eau \u0111\u1ecbnh c\u01b0, l\u00e0m vi\u1ec7c \u2014 ETEST gi\u00fap h\u1ecdc vi\u00ean \u00f4n luy\u1ec7n \u0111\u00fang tr\u1ecdng t\u00e2m v\u00e0 \u0111\u1ea1t k\u1ebft qu\u1ea3 mong mu\u1ed1n.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>FAQ \u2013 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/b><\/h2>\n<p><b>B\u1ea3ng tham chi\u1ebfu c\u00f4ng th\u1ee9c SAT Math c\u00f3 trong b\u00e0i thi Digital SAT kh\u00f4ng?<\/b><span style=\"font-weight: 400;\"> C\u00f3. \u1ee8ng d\u1ee5ng Bluebook t\u00edch h\u1ee3p s\u1eb5n b\u1ea3ng tham chi\u1ebfu c\u00f4ng th\u1ee9c, th\u00ed sinh c\u00f3 th\u1ec3 m\u1edf b\u1ea5t k\u1ef3 l\u00fac n\u00e0o trong c\u1ea3 hai module To\u00e1n th\u00f4ng qua bi\u1ec3u t\u01b0\u1ee3ng tham chi\u1ebfu \u1edf ph\u00eda tr\u00ean m\u00e0n h\u00ecnh.<\/span><\/p>\n<p><b>B\u1ea3ng tham chi\u1ebfu cung c\u1ea5p nh\u1eefng c\u00f4ng th\u1ee9c h\u00ecnh h\u1ecdc n\u00e0o?<\/b><span style=\"font-weight: 400;\"> B\u1ea3ng cung c\u1ea5p di\u1ec7n t\u00edch v\u00e0 chu vi h\u00ecnh tr\u00f2n, di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 tam gi\u00e1c, \u0111\u1ecbnh l\u00fd Pythagore, t\u1ec9 l\u1ec7 hai lo\u1ea1i tam gi\u00e1c vu\u00f4ng \u0111\u1eb7c bi\u1ec7t, th\u1ec3 t\u00edch c\u00e1c h\u00ecnh kh\u1ed1i c\u01a1 b\u1ea3n v\u00e0 m\u1ed9t s\u1ed1 d\u1eef ki\u1ec7n v\u1ec1 g\u00f3c.<\/span><\/p>\n<p><b>Nh\u1eefng c\u00f4ng th\u1ee9c n\u00e0o kh\u00f4ng c\u00f3 trong b\u1ea3ng tham chi\u1ebfu?<\/b><span style=\"font-weight: 400;\"> C\u00e1c n\u1ed9i dung nh\u01b0 ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng tr\u00f2n, kho\u1ea3ng c\u00e1ch v\u00e0 trung \u0111i\u1ec3m, t\u1ec9 s\u1ed1 l\u01b0\u1ee3ng gi\u00e1c, \u0111\u1ed9 d\u00e0i cung, di\u1ec7n t\u00edch h\u00ecnh qu\u1ea1t, di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh kh\u1ed1i v\u00e0 c\u00e1c c\u00f4ng th\u1ee9c \u0111\u1ea1i s\u1ed1 kh\u00f4ng n\u1eb1m trong b\u1ea3ng, n\u00ean c\u1ea7n \u0111\u01b0\u1ee3c ghi nh\u1edb.<\/span><\/p>\n<p><b>C\u00f3 n\u00ean tra b\u1ea3ng \u1edf m\u1ecdi c\u00e2u h\u00ecnh h\u1ecdc kh\u00f4ng?<\/b><span style=\"font-weight: 400;\"> Kh\u00f4ng n\u00ean. Nh\u1eefng c\u00f4ng th\u1ee9c xu\u1ea5t hi\u1ec7n th\u01b0\u1eddng xuy\u00ean nh\u01b0 di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n, di\u1ec7n t\u00edch tam gi\u00e1c v\u00e0 \u0111\u1ecbnh l\u00fd Pythagore n\u00ean \u0111\u01b0\u1ee3c thu\u1ed9c l\u00f2ng \u0111\u1ec3 ti\u1ebft ki\u1ec7m th\u1eddi gian, c\u00f2n b\u1ea3ng n\u00ean d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra c\u00e1c c\u00f4ng th\u1ee9c \u00edt g\u1eb7p h\u01a1n nh\u01b0 th\u1ec3 t\u00edch h\u00ecnh n\u00f3n hay h\u00ecnh c\u1ea7u.<\/span><\/p>\n<p><b>N\u00ean l\u00e0m quen v\u1edbi b\u1ea3ng tham chi\u1ebfu khi n\u00e0o?<\/b><span style=\"font-weight: 400;\"> N\u00ean m\u1edf b\u1ea3ng ngay trong c\u00e1c b\u00e0i thi th\u1eed Bluebook t\u1eeb giai \u0111o\u1ea1n \u00f4n luy\u1ec7n, \u0111\u1ec3 bi\u1ebft r\u00f5 v\u1ecb tr\u00ed, n\u1ed9i dung v\u00e0 c\u00e1ch thao t\u00e1c tr\u01b0\u1edbc ng\u00e0y thi ch\u00ednh th\u1ee9c.<\/span><\/p>\n<p><b>L\u00e0m sao \u0111\u1ec3 kh\u00f4ng nh\u1ea7m b\u00e1n k\u00ednh v\u1edbi \u0111\u01b0\u1eddng k\u00ednh?<\/b><span style=\"font-weight: 400;\"> H\u00e3y lu\u00f4n ki\u1ec3m tra k\u1ef9 \u0111\u1ec1 b\u00e0i cho \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0o tr\u01b0\u1edbc khi thay s\u1ed1, v\u00e0 n\u1ebfu c\u1ea7n, ghi r\u00f5 gi\u00e1 tr\u1ecb b\u00e1n k\u00ednh ra gi\u1ea5y nh\u00e1p tr\u01b0\u1edbc khi \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c.<\/span><\/p>\n<p><b>Desmos c\u00f3 th\u1ec3 thay th\u1ebf b\u1ea3ng tham chi\u1ebfu kh\u00f4ng?<\/b><span style=\"font-weight: 400;\"> Kh\u00f4ng thay th\u1ebf \u0111\u01b0\u1ee3c ho\u00e0n to\u00e0n, v\u00ec Desmos kh\u00f4ng cung c\u1ea5p c\u00f4ng th\u1ee9c. Tuy nhi\u00ean Desmos r\u1ea5t h\u1eefu \u00edch \u0111\u1ec3 gi\u1ea3i nhanh ph\u01b0\u01a1ng tr\u00ecnh sau khi \u0111\u00e3 thay s\u1ed1 v\u00e0o c\u00f4ng th\u1ee9c, ho\u1eb7c ki\u1ec3m tra l\u1ea1i k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n.<\/span><\/p>\n<p><b>C\u00e2u h\u1ecfi h\u00ecnh h\u1ecdc chi\u1ebfm t\u1ec9 tr\u1ecdng bao nhi\u00eau trong SAT Math?<\/b><span style=\"font-weight: 400;\"> H\u00ecnh h\u1ecdc v\u00e0 l\u01b0\u1ee3ng gi\u00e1c l\u00e0 m\u1ed9t trong b\u1ed1n nh\u00f3m n\u1ed9i dung c\u1ee7a ph\u1ea7n To\u00e1n, b\u00ean c\u1ea1nh \u0110\u1ea1i s\u1ed1, Ph\u00e2n t\u00edch n\u00e2ng cao v\u00e0 Gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u. Th\u00ed sinh n\u00ean tham kh\u1ea3o t\u00e0i li\u1ec7u ch\u00ednh th\u1ee9c c\u1ee7a College Board \u0111\u1ec3 bi\u1ebft t\u1ec9 tr\u1ecdng c\u1eadp nh\u1eadt.<\/span><\/p>\n<p><b>C\u00f3 c\u1ea7n nh\u1edb c\u00f4ng th\u1ee9c \u0111\u1ed9 d\u00e0i cung v\u00e0 di\u1ec7n t\u00edch h\u00ecnh qu\u1ea1t kh\u00f4ng?<\/b><span style=\"font-weight: 400;\"> C\u00f3, v\u00ec hai c\u00f4ng th\u1ee9c n\u00e0y kh\u00f4ng c\u00f3 trong b\u1ea3ng tham chi\u1ebfu. C\u00e1ch ghi nh\u1edb \u0111\u01a1n gi\u1ea3n l\u00e0 coi ch\u00fang nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a chu vi ho\u1eb7c di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n, t\u1ec9 l\u1ec7 v\u1edbi g\u00f3c \u1edf t\u00e2m chia cho 360 \u0111\u1ed9.<\/span><\/p>\n<p><b>C\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 luy\u1ec7n d\u00f9ng b\u1ea3ng tham chi\u1ebfu l\u00e0 g\u00ec?<\/b><span style=\"font-weight: 400;\"> Luy\u1ec7n tr\u00ean c\u00e1c b\u00e0i thi th\u1eed c\u1ee7a Bluebook, ghi l\u1ea1i nh\u1eefng c\u00e2u ph\u1ea3i m\u1edf b\u1ea3ng ho\u1eb7c l\u00e0m sai do nh\u1ea7m c\u00f4ng th\u1ee9c, r\u1ed3i l\u1eadp danh s\u00e1ch \u00f4n t\u1eadp ri\u00eang cho nh\u1eefng c\u00f4ng th\u1ee9c \u0111\u00f3.<\/span><\/p>\n<p>&nbsp;<\/p>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;34096&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;548&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;\u0110\u00e1nh gi\u00e1 b\u00e0i vi\u1ebft&quot;,&quot;legend&quot;:&quot;5\\\/5 - (548 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;SAT Math: C\u00e1ch S\u1eed D\u1ee5ng B\u1ea3ng Tham Chi\u1ebfu C\u00f4ng Th\u1ee9c \u0110\u1ec3 Gi\u1ea3i Nhanh C\u00e1c C\u00e2u H\u00ecnh H\u1ecdc&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (548 votes)    <\/div>\n    <\/div>","protected":false},"excerpt":{"rendered":"<p>B\u1ea3ng tham chi\u1ebfu c\u00f4ng th\u1ee9c SAT Math l\u00e0 m\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 b\u1ecb \u0111\u00e1nh gi\u00e1 th\u1ea5p nh\u1ea5t trong Digital SAT. Ph\u1ea7n l\u1edbn th\u00ed sinh bi\u1ebft r\u1eb1ng Bluebook c\u00f3 s\u1eb5n m\u1ed9t b\u1ea3ng c\u00f4ng th\u1ee9c, nh\u01b0ng r\u1ea5t \u00edt b\u1ea1n th\u1ef1c s\u1ef1 d\u00f9ng n\u00f3 c\u00f3 chi\u1ebfn l\u01b0\u1ee3c: c\u00f3 b\u1ea1n ch\u01b0a t\u1eebng m\u1edf b\u1ea3ng n\u00e0y tr\u01b0\u1edbc ng\u00e0y thi [&#8230;]","protected":false},"author":33,"featured_media":34092,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-34096","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/posts\/34096","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/users\/33"}],"replies":[{"embeddable":true,"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/comments?post=34096"}],"version-history":[{"count":1,"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/posts\/34096\/revisions"}],"predecessor-version":[{"id":34097,"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/posts\/34096\/revisions\/34097"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/media\/34092"}],"wp:attachment":[{"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/media?parent=34096"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/categories?post=34096"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/etest.edu.vn\/en\/wp-json\/wp\/v2\/tags?post=34096"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}