{"id":532029,"date":"2026-03-19T18:17:11","date_gmt":"2026-03-19T11:17:11","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=532029"},"modified":"2026-03-19T18:17:11","modified_gmt":"2026-03-19T11:17:11","slug":"giai-ma-hinh-tam-giac-co-tam-doi-xung-hay-khong","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/giai-ma-hinh-tam-giac-co-tam-doi-xung-hay-khong\/","title":{"rendered":"Gi\u1ea3i M\u00e3: H\u00ecnh Tam Gi\u00e1c C\u00f3 T\u00e2m \u0110\u1ed1i X\u1ee9ng Hay Kh\u00f4ng?"},"content":{"rendered":"<p style=\"text-align: justify;\"><b>H\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng?<\/b><span style=\"font-weight: 400;\"> H\u1ea7u h\u1ebft c\u00e1c h\u00ecnh tam gi\u00e1c kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng. Ch\u1ec9 tam gi\u00e1c \u0111\u1ec1u m\u1edbi c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng, c\u00f2n c\u00e1c lo\u1ea1i tam gi\u00e1c kh\u00e1c nh\u01b0 tam gi\u00e1c c\u00e2n, tam gi\u00e1c vu\u00f4ng, tam gi\u00e1c th\u01b0\u1eddng \u0111\u1ec1u kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>Kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 t\u00e2m \u0111\u1ed1i x\u1ee9ng v\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o h\u00ecnh tam gi\u00e1c, h\u00e3y c\u00f9ng \u00f4n l\u1ea1i hai kh\u00e1i ni\u1ec7m quan tr\u1ecdng: <\/span><b>t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\"> v\u00e0 <\/span><b>tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\">. \u0110\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 b\u1ea1n ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng c\u00e1c lo\u1ea1i \u0111\u1ed1i x\u1ee9ng trong h\u00ecnh h\u1ecdc ph\u1eb3ng.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>T\u00e2m \u0111\u1ed1i x\u1ee9ng trong h\u00ecnh h\u1ecdc l\u00e0 g\u00ec?<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u v\u1ec1 <\/span><b>h\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng?<\/b><span style=\"font-weight: 400;\"> B\u1ea1n c\u1ea7n hi\u1ec3u v\u1ec1 t\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 g\u00ec? <\/span><b>T\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\"> c\u1ee7a m\u1ed9t h\u00ecnh l\u00e0 \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t sao cho khi quay h\u00ecnh quanh \u0111i\u1ec3m n\u00e0y m\u1ed9t g\u00f3c 180 \u0111\u1ed9 (n\u1eeda v\u00f2ng tr\u00f2n), h\u00ecnh s\u1ebd tr\u00f9ng kh\u00edt v\u1edbi ch\u00ednh n\u00f3. Hi\u1ec3u \u0111\u01a1n gi\u1ea3n, m\u1ed7i \u0111i\u1ec3m c\u1ee7a h\u00ecnh n\u1ebfu n\u1ed1i v\u1edbi t\u00e2m \u0111\u1ed1i x\u1ee9ng s\u1ebd c\u00f3 m\u1ed9t \u0111i\u1ec3m \u0111\u1ed1i x\u1ee9ng t\u01b0\u01a1ng \u1ee9ng \u1edf ph\u00eda b\u00ean kia t\u00e2m, c\u00e1ch t\u00e2m m\u1ed9t kho\u1ea3ng b\u1eb1ng nhau.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>T\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng:<\/b><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Khi quay h\u00ecnh quanh t\u00e2m \u0111\u1ed1i x\u1ee9ng m\u1ed9t g\u00f3c 180\u00b0, h\u00ecnh kh\u00f4ng thay \u0111\u1ed5i v\u1ecb tr\u00ed (tr\u00f9ng kh\u00edt v\u1edbi ch\u00ednh n\u00f3).<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">M\u1ecdi \u0111\u01b0\u1eddng th\u1eb3ng qua t\u00e2m \u0111\u1ed1i x\u1ee9ng \u0111\u1ec1u chia h\u00ecnh th\u00e0nh hai ph\u1ea7n b\u1eb1ng nhau v\u00e0 \u0111\u1ed1i x\u1ee9ng qua t\u00e2m.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-1.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-1-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-1-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-532124 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-1.jpg\" alt=\"hinh-tam-giac-co-tam-doi-xung-khong-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p style=\"text-align: justify;\"><b>M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 h\u00ecnh c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng:<\/b><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>H\u00ecnh tr\u00f2n:<\/b><span style=\"font-weight: 400;\"> M\u1ecdi \u0111i\u1ec3m tr\u00ean \u0111\u01b0\u1eddng tr\u00f2n \u0111\u1ec1u \u0111\u1ed1i x\u1ee9ng qua t\u00e2m c\u1ee7a n\u00f3.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>H\u00ecnh vu\u00f4ng, h\u00ecnh ch\u1eef nh\u1eadt:<\/b><span style=\"font-weight: 400;\"> T\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>H\u00ecnh b\u00ecnh h\u00e0nh:<\/b><span style=\"font-weight: 400;\"> Giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><b>C\u00e1ch x\u00e1c \u0111\u1ecbnh t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a h\u00ecnh:<\/b><\/p>\n<ol style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">X\u00e1c \u0111\u1ecbnh xem h\u00ecnh c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng (b\u1eb1ng c\u00e1ch th\u1eed quay 180\u00b0 ho\u1eb7c ki\u1ec3m tra c\u00e1c c\u1eb7p \u0111i\u1ec3m \u0111\u1ed1i x\u1ee9ng).<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">N\u1ebfu c\u00f3, t\u00ecm \u0111i\u1ec3m m\u00e0 m\u1ecdi c\u1eb7p \u0111i\u1ec3m \u0111\u1ed1i x\u1ee9ng qua \u0111\u00f3 \u0111\u1ec1u n\u1eb1m tr\u00ean h\u00ecnh.<\/span><\/li>\n<\/ol>\n<h3 style=\"text-align: justify;\"><b>Ph\u00e2n bi\u1ec7t t\u00e2m \u0111\u1ed1i x\u1ee9ng v\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong c\u00e2u h\u1ecfi <\/span><b>h\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng? <\/b><span style=\"font-weight: 400;\">B\u1ea1n c\u1ea7n ph\u00e2n bi\u1ec7t t\u00e2m \u0111\u1ed1i v\u1edbi v\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng l\u00e0 g\u00ec? <\/span><b>Tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\"> l\u00e0 \u0111\u01b0\u1eddng th\u1eb3ng m\u00e0 khi g\u1ea5p h\u00ecnh theo \u0111\u01b0\u1eddng \u0111\u00f3, hai ph\u1ea7n c\u1ee7a h\u00ecnh s\u1ebd tr\u00f9ng kh\u00edt nhau. N\u00f3i c\u00e1ch kh\u00e1c, m\u1ed7i \u0111i\u1ec3m c\u1ee7a h\u00ecnh c\u00e1ch tr\u1ee5c \u0111\u1ed1i x\u1ee9ng m\u1ed9t \u0111o\u1ea1n s\u1ebd c\u00f3 \u0111i\u1ec3m \u0111\u1ed1i x\u1ee9ng t\u01b0\u01a1ng \u1ee9ng \u1edf ph\u00eda b\u00ean kia tr\u1ee5c v\u1edbi c\u00f9ng kho\u1ea3ng c\u00e1ch.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>So s\u00e1nh nhanh T\u00e2m \u0111\u1ed1i x\u1ee9ng vs Tr\u1ee5c \u0111\u1ed1i x\u1ee9ng:<\/b><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Ti\u00eau ch\u00ed<\/b><\/td>\n<td><b>T\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><\/td>\n<td><b>Tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">B\u1ea3n ch\u1ea5t<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110i\u1ec3m c\u1ed1 \u0111\u1ecbnh, quay 180\u00b0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110\u01b0\u1eddng th\u1eb3ng, l\u1eadt g\u1eadp h\u00ecnh<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">V\u00ed d\u1ee5<\/span><\/td>\n<td><span style=\"font-weight: 400;\">T\u00e2m h\u00ecnh tr\u00f2n, giao \u0111i\u1ec3m ch\u00e9o h\u00ecnh ch\u1eef nh\u1eadt<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Tr\u1ee5c d\u1ecdc h\u00ecnh ch\u1eef nh\u1eadt, tr\u1ee5c qua \u0111\u1ec9nh tam gi\u00e1c c\u00e2n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh c\u00f3 c\u1ea3 hai<\/span><\/td>\n<td><span style=\"font-weight: 400;\">H\u00ecnh vu\u00f4ng, h\u00ecnh ch\u1eef nh\u1eadt<\/span><\/td>\n<td><span style=\"font-weight: 400;\">H\u00ecnh vu\u00f4ng, h\u00ecnh tr\u00f2n<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify;\"><b>L\u01b0u \u00fd:<\/b><span style=\"font-weight: 400;\"> M\u1ed9t s\u1ed1 h\u00ecnh c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng nh\u01b0ng kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Vai tr\u00f2 c\u1ee7a t\u1eebng lo\u1ea1i \u0111\u1ed1i x\u1ee9ng:<\/b><span style=\"font-weight: 400;\"> Tr\u1ee5c \u0111\u1ed1i x\u1ee9ng th\u01b0\u1eddng g\u1eb7p trong t\u1ef1 nhi\u00ean (c\u00e1nh b\u01b0\u1edbm, l\u00e1 c\u00e2y), c\u00f2n t\u00e2m \u0111\u1ed1i x\u1ee9ng th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf c\u00e1c h\u00ecnh h\u1ecdc chu\u1ea9n m\u1ef1c, c\u00e1c thi\u1ebft k\u1ebf mang t\u00ednh k\u1ef9 thu\u1eadt.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-2.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-2-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-2-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-532123 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-2.jpg\" alt=\"hinh-tam-giac-co-tam-doi-xung-khong-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2 style=\"text-align: justify;\"><b>H\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng? Gi\u1ea3i \u0111\u00e1p chi ti\u1ebft<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">H\u1ea7u h\u1ebft c\u00e1c h\u00ecnh tam gi\u00e1c (c\u1ea3 c\u00e2n, vu\u00f4ng, t\u00f9, nh\u1ecdn) \u0111\u1ec1u <\/span><b>kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\">. Ch\u1ec9 ri\u00eang tam gi\u00e1c \u0111\u1ec1u m\u1edbi c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng, \u0111\u00f3 l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>L\u00fd gi\u1ea3i v\u00ec sao tam gi\u00e1c th\u01b0\u1eddng kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">N\u1ebfu th\u1eed quay m\u1ed9t tam gi\u00e1c b\u1ea5t k\u1ef3 (kh\u00f4ng \u0111\u1ec1u) quanh m\u1ed9t \u0111i\u1ec3m n\u00e0o \u0111\u00f3 180\u00b0, ta s\u1ebd th\u1ea5y h\u00ecnh sau khi quay kh\u00f4ng tr\u00f9ng kh\u1edbp v\u1edbi h\u00ecnh ban \u0111\u1ea7u. L\u00fd do l\u00e0 ba c\u1ea1nh v\u00e0 ba g\u00f3c c\u1ee7a tam gi\u00e1c th\u01b0\u1eddng kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, n\u00ean kh\u00f4ng th\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c \u0111i\u1ec3m \u0111\u1ed1i x\u1ee9ng chung cho m\u1ecdi c\u1eb7p \u0111i\u1ec3m.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 minh h\u1ecda:<\/b><span style=\"font-weight: 400;\"> Khi b\u1ea1n n\u1ed1i hai \u0111\u1ec9nh b\u1ea5t k\u1ef3 c\u1ee7a tam gi\u00e1c th\u01b0\u1eddng v\u00e0 th\u1eed x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m gi\u1eefa, quay 180\u00b0 qua \u0111\u00f3, h\u00ecnh kh\u00f4ng tr\u00f9ng v\u1edbi h\u00ecnh ban \u0111\u1ea7u. Do \u0111\u00f3, tam gi\u00e1c th\u01b0\u1eddng kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>\u0110i\u1ec1u ki\u1ec7n \u0111\u1ec3 tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Ch\u1ec9 tam gi\u00e1c \u0111\u1ec1u (ba c\u1ea1nh v\u00e0 ba g\u00f3c b\u1eb1ng nhau) m\u1edbi c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">T\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a tam gi\u00e1c \u0111\u1ec1u ch\u00ednh l\u00e0 tr\u1ecdng t\u00e2m, c\u0169ng l\u00e0 giao \u0111i\u1ec3m c\u00e1c \u0111\u01b0\u1eddng cao, \u0111\u01b0\u1eddng trung tuy\u1ebfn v\u00e0 \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c.<\/span><\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><b>C\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3:<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c \u0111\u1ec1u:<\/b><span style=\"font-weight: 400;\"> C\u00f3 duy nh\u1ea5t m\u1ed9t t\u00e2m \u0111\u1ed1i x\u1ee9ng (tr\u1ecdng t\u00e2m).<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c c\u00e2n:<\/b><span style=\"font-weight: 400;\"> Kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng, ch\u1ec9 c\u00f3 m\u1ed9t tr\u1ee5c \u0111\u1ed1i x\u1ee9ng.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c vu\u00f4ng:<\/b><span style=\"font-weight: 400;\"> Kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng, c\u00f3 th\u1ec3 c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng n\u1ebfu l\u00e0 tam gi\u00e1c vu\u00f4ng c\u00e2n.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c t\u00f9, tam gi\u00e1c nh\u1ecdn:<\/b><span style=\"font-weight: 400;\"> Nhi\u1ec1u ng\u01b0\u1eddi th\u1eafc m\u1eafc <\/span><b>h\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng? <\/b><span style=\"font-weight: 400;\">Kh\u00f4ng ph\u1ea3i tam gi\u00e1c n\u00e0o c\u0169ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng, \u0111i\u1ec3n h\u00ecnh nh\u01b0 tam gi\u00e1c t\u00f9 v\u00e0 tam gi\u00e1c nh\u1ecdn.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-3.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-3-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-3-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-532125 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-3.jpg\" alt=\"hinh-tam-giac-co-tam-doi-xung-khong-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2 style=\"text-align: justify;\"><b>H\u00ecnh tam gi\u00e1c c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng kh\u00f4ng? S\u1ed1 l\u01b0\u1ee3ng v\u00e0 v\u1ecb tr\u00ed<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f3, m\u1ed9t s\u1ed1 lo\u1ea1i tam gi\u00e1c nh\u1ea5t \u0111\u1ecbnh c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng. Tam gi\u00e1c \u0111\u1ec1u c\u00f3 ba tr\u1ee5c \u0111\u1ed1i x\u1ee9ng, tam gi\u00e1c c\u00e2n c\u00f3 m\u1ed9t tr\u1ee5c \u0111\u1ed1i x\u1ee9ng, c\u00f2n tam gi\u00e1c th\u01b0\u1eddng kh\u00f4ng c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng n\u00e0o.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Chi ti\u1ebft v\u1ec1 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng c\u1ee7a t\u1eebng lo\u1ea1i tam gi\u00e1c:<\/b><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c \u0111\u1ec1u:<\/b><span style=\"font-weight: 400;\"> C\u00f3 3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng, m\u1ed7i tr\u1ee5c \u0111i qua m\u1ed9t \u0111\u1ec9nh v\u00e0 trung \u0111i\u1ec3m c\u1ea1nh \u0111\u1ed1i di\u1ec7n.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c c\u00e2n:<\/b><span style=\"font-weight: 400;\"> C\u00f3 1 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng, l\u00e0 \u0111\u01b0\u1eddng cao (ho\u1eb7c trung tuy\u1ebfn, ph\u00e2n gi\u00e1c) k\u1ebb t\u1eeb \u0111\u1ec9nh c\u00e2n \u0111\u1ebfn c\u1ea1nh \u0111\u00e1y.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c th\u01b0\u1eddng:<\/b><span style=\"font-weight: 400;\"> Kh\u00f4ng c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng (tr\u1eeb tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t l\u00e0 tam gi\u00e1c \u0111\u1ec1u ho\u1eb7c c\u00e2n).<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c vu\u00f4ng c\u00e2n:<\/b><span style=\"font-weight: 400;\"> C\u00f3 1 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng, l\u00e0 \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c g\u00f3c vu\u00f4ng.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><b>Minh h\u1ecda:<\/b><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Lo\u1ea1i tam gi\u00e1c<\/b><\/td>\n<td><b>S\u1ed1 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/b><\/td>\n<td><b>M\u00f4 t\u1ea3<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Tam gi\u00e1c \u0111\u1ec1u<\/span><\/td>\n<td><span style=\"font-weight: 400;\">3<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Qua m\u1ed7i \u0111\u1ec9nh v\u00e0 trung \u0111i\u1ec3m c\u1ea1nh \u0111\u1ed1i di\u1ec7n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Tam gi\u00e1c c\u00e2n<\/span><\/td>\n<td><span style=\"font-weight: 400;\">1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Qua \u0111\u1ec9nh c\u00e2n v\u00e0 trung \u0111i\u1ec3m \u0111\u00e1y<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Tam gi\u00e1c th\u01b0\u1eddng<\/span><\/td>\n<td><span style=\"font-weight: 400;\">0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Kh\u00f4ng c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Tam gi\u00e1c vu\u00f4ng c\u00e2n<\/span><\/td>\n<td><span style=\"font-weight: 400;\">1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">L\u00e0 ph\u00e2n gi\u00e1c g\u00f3c vu\u00f4ng<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-4.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-4-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-4-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-532122 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-4.jpg\" alt=\"hinh-tam-giac-co-tam-doi-xung-khong-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2 style=\"text-align: justify;\"><b>T\u00e2m \u0111\u1ed1i x\u1ee9ng v\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng c\u1ee7a c\u00e1c h\u00ecnh ph\u1eb3ng kh\u00e1c<\/b><\/h2>\n<p style=\"text-align: justify;\"><b>H\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng? <\/b><span style=\"font-weight: 400;\">Nhi\u1ec1u h\u00ecnh ph\u1eb3ng th\u00f4ng d\u1ee5ng ngo\u00e0i tam gi\u00e1c c\u00f2n s\u1edf h\u1eefu t\u00ednh \u0111\u1ed1i x\u1ee9ng \u0111\u1eb7c bi\u1ec7t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u1ed5ng h\u1ee3p v\u1ec1 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a t\u00e2m \u0111\u1ed1i x\u1ee9ng v\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng \u1edf c\u00e1c h\u00ecnh ph\u1eb3ng th\u01b0\u1eddng g\u1eb7p:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>H\u00ecnh<\/b><\/td>\n<td><b>C\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng?<\/b><\/td>\n<td><b>C\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng?<\/b><\/td>\n<td><b>Ghi ch\u00fa<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh tr\u00f2n<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (t\u00e2m h\u00ecnh tr\u00f2n)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">V\u00f4 s\u1ed1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1ecdi \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ec1u l\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh vu\u00f4ng<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">4<\/span><\/td>\n<td><span style=\"font-weight: 400;\">2 tr\u1ee5c qua t\u00e2m, 2 tr\u1ee5c qua c\u1ea1nh<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh ch\u1eef nh\u1eadt<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Tr\u1ee5c qua t\u00e2m v\u00e0 song song hai c\u1ea1nh<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh b\u00ecnh h\u00e0nh<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Kh\u00f4ng<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Kh\u00f4ng c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh thoi<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Tr\u1ee5c qua hai \u0111\u01b0\u1eddng ch\u00e9o<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh l\u1ee5c gi\u00e1c \u0111\u1ec1u<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (t\u00e2m h\u00ecnh)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">6<\/span><\/td>\n<td><span style=\"font-weight: 400;\">\u0110a gi\u00e1c \u0111\u1ec1u n\u00e0o c\u0169ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">H\u00ecnh thang c\u00e2n<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Kh\u00f4ng<\/span><\/td>\n<td><span style=\"font-weight: 400;\">1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Ch\u1ec9 c\u00f3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng qua trung \u0111i\u1ec3m \u0111\u00e1y<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Ng\u0169 gi\u00e1c \u0111\u1ec1u<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (t\u00e2m h\u00ecnh)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">5<\/span><\/td>\n<td><span style=\"font-weight: 400;\">M\u1ed7i tr\u1ee5c qua \u0111\u1ec9nh v\u00e0 c\u1ea1nh \u0111\u1ed1i di\u1ec7n<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Elip<\/span><\/td>\n<td><span style=\"font-weight: 400;\">C\u00f3 (t\u00e2m elip)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Qua hai tr\u1ee5c l\u1edbn v\u00e0 nh\u1ecf<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-5.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-5-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-5-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-532121 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-5.jpg\" alt=\"hinh-tam-giac-co-tam-doi-xung-khong-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/03\/hinh-tam-giac-co-tam-doi-xung-khong-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 minh h\u1ecda v\u00e0 b\u00e0i t\u1eadp v\u1ec1 t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u1ec3 hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 <\/span><b>t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a h\u00ecnh tam gi\u00e1c<\/b><span style=\"font-weight: 400;\"> v\u00e0 c\u00e1c h\u00ecnh kh\u00e1c, h\u00e3y c\u00f9ng xem m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u00e0 b\u00e0i t\u1eadp th\u1ef1c t\u1ebf sau:<\/span><\/p>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 1: X\u00e1c \u0111\u1ecbnh t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a c\u00e1c h\u00ecnh sau<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><b>H\u00ecnh tr\u00f2n:<\/b><span style=\"font-weight: 400;\"> T\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 t\u00e2m c\u1ee7a \u0111\u01b0\u1eddng tr\u00f2n.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>H\u00ecnh vu\u00f4ng:<\/b><span style=\"font-weight: 400;\"> T\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c \u0111\u1ec1u:<\/b><span style=\"font-weight: 400;\"> T\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 tr\u1ecdng t\u00e2m.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Tam gi\u00e1c c\u00e2n, tam gi\u00e1c th\u01b0\u1eddng:<\/b><span style=\"font-weight: 400;\"> Kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng.<\/span><\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><b>V\u00ed d\u1ee5 2: Cho tam gi\u00e1c ABC \u0111\u1ec1u, h\u00e3y ch\u1ec9 ra t\u00e2m \u0111\u1ed1i x\u1ee9ng v\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng<\/b><\/h3>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">T\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 giao \u0111i\u1ec3m ba \u0111\u01b0\u1eddng trung tuy\u1ebfn (tr\u1ecdng t\u00e2m G).<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u00f3 3 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng, m\u1ed7i tr\u1ee5c \u0111i qua m\u1ed9t \u0111\u1ec9nh v\u00e0 trung \u0111i\u1ec3m c\u1ea1nh \u0111\u1ed1i di\u1ec7n.<\/span><\/li>\n<\/ul>\n<h3 style=\"text-align: justify;\"><b>B\u00e0i t\u1eadp t\u1ef1 luy\u1ec7n:<\/b><\/h3>\n<ol style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">V\u1ebd m\u1ed9t tam gi\u00e1c c\u00e2n v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng hay kh\u00f4ng. Gi\u1ea3i th\u00edch l\u00fd do.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Li\u1ec7t k\u00ea c\u00e1c h\u00ecnh ph\u1eb3ng c\u00f3 c\u1ea3 t\u00e2m \u0111\u1ed1i x\u1ee9ng v\u00e0 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng \u0111\u00e3 h\u1ecdc.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">T\u00ecm t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh v\u00e0 h\u00ecnh thoi.<\/span><\/li>\n<\/ol>\n<h2 style=\"text-align: justify;\"><b>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/b><\/h2>\n<p style=\"text-align: justify;\"><b>h\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng? <\/b><b>Tam gi\u00e1c c\u00e2n c\u00f3 kh\u00f4ng?<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tam gi\u00e1c c\u00e2n <\/span><b>kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\">. D\u00f9 c\u00f3 m\u1ed9t tr\u1ee5c \u0111\u1ed1i x\u1ee9ng (\u0111\u01b0\u1eddng cao t\u1eeb \u0111\u1ec9nh c\u00e2n xu\u1ed1ng \u0111\u00e1y), nh\u01b0ng kh\u00f4ng t\u1ed3n t\u1ea1i \u0111i\u1ec3m n\u00e0o m\u00e0 khi quay 180\u00b0 quanh \u0111\u00f3, tam gi\u00e1c c\u00e2n tr\u00f9ng kh\u00edt v\u1edbi ch\u00ednh n\u00f3.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>H\u00ecnh l\u1ee5c gi\u00e1c \u0111\u1ec1u c\u00f3 bao nhi\u00eau t\u00e2m \u0111\u1ed1i x\u1ee9ng?<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">H\u00ecnh l\u1ee5c gi\u00e1c \u0111\u1ec1u ch\u1ec9 c\u00f3 <\/span><b>m\u1ed9t t\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\"> (t\u00e2m h\u00ecnh). Tuy nhi\u00ean, n\u00f3 c\u00f3 t\u1edbi 6 tr\u1ee5c \u0111\u1ed1i x\u1ee9ng, m\u1ed7i tr\u1ee5c \u0111i qua m\u1ed9t \u0111\u1ec9nh v\u00e0 t\u00e2m ho\u1eb7c qua trung \u0111i\u1ec3m hai c\u1ea1nh \u0111\u1ed1i di\u1ec7n.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng?<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f3, h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o. Khi quay h\u00ecnh b\u00ecnh h\u00e0nh 180\u00b0 quanh \u0111i\u1ec3m n\u00e0y, h\u00ecnh tr\u00f9ng kh\u00edt v\u1edbi ch\u00ednh n\u00f3.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>H\u00ecnh thoi c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng?<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f3. H\u00ecnh thoi c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng l\u00e0 giao \u0111i\u1ec3m hai \u0111\u01b0\u1eddng ch\u00e9o, \u0111\u1ed3ng th\u1eddi c\u00f3 hai tr\u1ee5c \u0111\u1ed1i x\u1ee9ng l\u00e0 hai \u0111\u01b0\u1eddng ch\u00e9o \u0111\u00f3.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>T\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a h\u00ecnh tr\u00f2n l\u00e0 g\u00ec?<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">T\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a h\u00ecnh tr\u00f2n ch\u00ednh l\u00e0 t\u00e2m c\u1ee7a \u0111\u01b0\u1eddng tr\u00f2n. Quay h\u00ecnh tr\u00f2n 180\u00b0 quanh t\u00e2m ho\u1eb7c b\u1ea5t k\u1ef3 g\u00f3c n\u00e0o, h\u00ecnh v\u1eabn tr\u00f9ng v\u1edbi ch\u00ednh n\u00f3.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>H\u00ecnh tam gi\u00e1c vu\u00f4ng c\u00e2n c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng?<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tam gi\u00e1c vu\u00f4ng c\u00e2n kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng, ch\u1ec9 c\u00f3 m\u1ed9t tr\u1ee5c \u0111\u1ed1i x\u1ee9ng l\u00e0 \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c c\u1ee7a g\u00f3c vu\u00f4ng.<\/span><\/p>\n<p style=\"text-align: justify;\"><b>Xem th\u00eam:<\/b><\/p>\n<ul>\n<li>\n<p class=\"elementor-heading-title elementor-size-default\"><span style=\"color: #339966;\"><strong><a style=\"color: #339966;\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/huong-dan-toan-dien-cach-doi-don-vi-do-luong-chinh-xac-va-nhanh-chong\/\">H\u01b0\u1edbng D\u1eabn To\u00e0n Di\u1ec7n: C\u00e1ch \u0110\u1ed5i \u0110\u01a1n V\u1ecb \u0110o L\u01b0\u1eddng Ch\u00ednh X\u00e1c v\u00e0 Nhanh Ch\u00f3ng<\/a><\/strong><\/span><\/p>\n<\/li>\n<li>\n<p class=\"elementor-heading-title elementor-size-default\"><span style=\"color: #339966;\"><strong><a style=\"color: #339966;\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/sin-cos-tan-la-gi-huong-dan-chi-tiet-tu-a-den-z-ve-luong-giac\/\">Sin Cos Tan l\u00e0 G\u00ec? H\u01b0\u1edbng D\u1eabn Chi Ti\u1ebft T\u1eeb A \u0110\u1ebfn Z V\u1ec1 L\u01b0\u1ee3ng Gi\u00e1c<\/a><\/strong><\/span><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>H\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng? H\u1ea7u h\u1ebft c\u00e1c h\u00ecnh tam gi\u00e1c kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng. Ch\u1ec9 tam gi\u00e1c \u0111\u1ec1u m\u1edbi c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng, c\u00f2n c\u00e1c lo\u1ea1i tam gi\u00e1c kh\u00e1c nh\u01b0 tam gi\u00e1c c\u00e2n, tam gi\u00e1c vu\u00f4ng, tam gi\u00e1c th\u01b0\u1eddng \u0111\u1ec1u kh\u00f4ng c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng. Kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 [&hellip;]<\/p>\n","protected":false},"author":84,"featured_media":532120,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29235,3910,30453],"tags":[],"class_list":["post-532029","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goc-to-mo","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Gi\u1ea3i M\u00e3: H\u00ecnh Tam Gi\u00e1c C\u00f3 T\u00e2m \u0110\u1ed1i X\u1ee9ng Kh\u00f4ng?<\/title>\n<meta name=\"description\" content=\"T\u00ecm hi\u1ec3u li\u1ec7u h\u00ecnh tam gi\u00e1c c\u00f3 t\u00e2m \u0111\u1ed1i x\u1ee9ng kh\u00f4ng, ph\u00e2n t\u00edch t\u1eebng lo\u1ea1i tam gi\u00e1c v\u00e0 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh h\u1ecdc quan 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