{"id":299098,"date":"2023-12-23T15:46:26","date_gmt":"2023-12-23T08:46:26","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=299098"},"modified":"2023-12-23T15:46:26","modified_gmt":"2023-12-23T08:46:26","slug":"trong-tam-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/trong-tam-la-gi\/","title":{"rendered":"T\u00ednh ch\u1ea5t c\u1ee7a tr\u1ecdng t\u00e2m v\u00e0 c\u00e1ch x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m tam gi\u00e1c trong H\u00ecnh h\u1ecdc"},"content":{"rendered":"<p><i><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m tam gi\u00e1c l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n nh\u01b0ng v\u00f4 c\u00f9ng quan tr\u1ecdng trong l\u0129nh v\u1ef1c h\u00ecnh h\u1ecdc. \u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 trung \u0111i\u1ec3m \u0111\u01a1n thu\u1ea7n c\u1ee7a tam gi\u00e1c, m\u00e0 c\u00f2n l\u00e0 v\u1ecb tr\u00ed ch\u1ee9a nhi\u1ec1u t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t. Ch\u00fang c\u00f2n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau nh\u01b0 ki\u1ebfn tr\u00fac, thi\u1ebft k\u1ebf v\u00e0 th\u1eadm ch\u00ed trong nghi\u00ean c\u1ee9u v\u1ec1 quy lu\u1eadt v\u1eadn \u0111\u1ed9ng c\u1ee7a v\u0169 tr\u1ee5. V\u1eady, th\u1ef1c ch\u1ea5t <\/span><\/i><b><i>tr\u1ecdng t\u00e2m l\u00e0 g\u00ec<\/i><\/b><i><span style=\"font-weight: 400;\">? \u0110i\u1ec3m n\u00e0y c\u00f3 t\u00ednh ch\u1ea5t nh\u01b0 th\u1ebf n\u00e0o v\u00e0 l\u00e0m sao \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh? C\u00f9ng tham kh\u1ea3o th\u00eam g\u1ee3i \u00fd t\u1eeb <\/span><\/i><b><i>Ho\u00e0ng H\u00e0 Mobile<\/i><\/b><i><span style=\"font-weight: 400;\"> \u0111\u1ec3 c\u00f3 c\u00e1i nh\u00ecn chi ti\u1ebft h\u01a1n v\u1ec1 ch\u1ee7 \u0111\u1ec1 tr\u00ean nh\u00e9.<\/span><\/i><\/p>\n<h2><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m l\u00e0 g\u00ec?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m c\u1ee7a m\u1ed9t h\u00ecnh h\u1ecdc, \u0111\u1eb7c bi\u1ec7t l\u00e0 tam gi\u00e1c, l\u00e0 m\u1ed9t \u0111i\u1ec3m trong kh\u00f4ng gian \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n d\u1ef1a tr\u00ean c\u00e1c \u0111\u1eb7c t\u00ednh h\u00ecnh h\u1ecdc c\u1ee7a h\u00ecnh \u0111\u00f3. \u0110\u1ed1i v\u1edbi tam gi\u00e1c, tr\u1ecdng t\u00e2m l\u00e0 \u0111i\u1ec3m giao nhau c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng trung tuy\u1ebfn. Theo \u0111\u00f3, \u0111\u01b0\u1eddng trung tuy\u1ebfn ch\u00ednh l\u00e0 c\u00e1c \u0111o\u1ea1n th\u1eb3ng n\u1ed1i m\u1ed7i \u0111\u1ec9nh c\u1ee7a tam gi\u00e1c v\u1edbi trung \u0111i\u1ec3m c\u1ee7a c\u1ea1nh \u0111\u1ed1i di\u1ec7n. Do \u0111\u00f3, ch\u00fang ta s\u1ebd c\u00f3 ba trung tuy\u1ebfn trong m\u1ed9t tam gi\u00e1c v\u00e0 tr\u1ecdng t\u00e2m ch\u00ednh l\u00e0 \u0111i\u1ec3m g\u1eb7p nhau c\u1ee7a ba \u0111\u01b0\u1eddng trung tuy\u1ebfn n\u00e0y.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-1.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-1-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-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-299100 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-1.jpg\" alt=\"trong-tam-la-gi-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p><span style=\"font-weight: 400;\">V\u1ec1 c\u01a1 b\u1ea3n, khi t\u00ecm hi\u1ec3u tr\u1ecdng t\u00e2m l\u00e0 g\u00ec, nhi\u1ec1u ng\u01b0\u1eddi s\u1ebd kh\u00f4ng bi\u1ebft \u0111\u01b0\u1ee3c r\u1eb1ng, \u0111i\u1ec3m c\u1eaft c\u1ee7a 3 \u0111\u01b0\u1eddng trung tuy\u1ebfn trong tam gi\u00e1c s\u1ebd s\u1edf h\u1eefu nhi\u1ec1u t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t. Ch\u00fang kh\u00f4ng ch\u1ec9 quan tr\u1ecdng trong l\u0129nh v\u1ef1c h\u00ecnh h\u1ecdc m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng s\u00e2u r\u1ed9ng v\u00e0o nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau nh\u01b0 to\u00e1n h\u1ecdc thu\u1ea7n t\u00fay, v\u1eadt l\u00fd, k\u1ef9 thu\u1eadt, ki\u1ebfn tr\u00fac v\u00e0 th\u1eadm ch\u00ed trong nghi\u00ean c\u1ee9u v\u1ec1 \u0111\u1ed9ng l\u1ef1c h\u00e0nh tinh.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, tr\u1ecdng t\u00e2m c\u0169ng hay \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u v\u00e0 gi\u1ea3i quy\u1ebft nhi\u1ec1u b\u00e0i to\u00e1n h\u00ecnh h\u1ecdc ph\u1ee9c t\u1ea1p. Do \u0111\u00f3, n\u1ebfu \u0111ang g\u1eb7p nhi\u1ec1u th\u1eafc m\u1eafc trong t\u00ednh ch\u1ea5t v\u00e0 c\u00e1ch x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t n\u00e0y trong tam gi\u00e1c th\u00ec b\u1ea1n n\u00ean tham kh\u1ea3o ti\u1ebfp n\u1ed9i dung \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y sau \u0111\u00e2y.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">T\u00ednh ch\u1ea5t c\u1ee7a tr\u1ecdng t\u00e2m l\u00e0 g\u00ec?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Hi\u1ec3u \u0111\u01b0\u1ee3c tr\u1ecdng t\u00e2m l\u00e0 g\u00ec, tuy nhi\u00ean th\u1ef1c t\u1ebf l\u1ea1i \u00edt c\u00f3 ai n\u1eafm b\u1eaft h\u1ebft \u0111\u01b0\u1ee3c to\u00e0n b\u1ed9 t\u00ednh ch\u1ea5t c\u1ee7a \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t n\u00e0y. Th\u1ea5u hi\u1ec3u nhu c\u1ea7u \u1ea5y, ch\u00fang t\u00f4i \u0111\u00e3 t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a \u0111i\u1ec3m tr\u1ecdng t\u00e2m trong tam gi\u00e1c \u0111\u1ec3 b\u1ea1n c\u00f9ng nh\u00ecn l\u1ea1i qua n\u1ed9i dung sau:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><b>Trung \u0111i\u1ec3m c\u1ee7a c\u00e1c c\u1ea1nh<\/b><span style=\"font-weight: 400;\">: Tr\u1ecdng t\u00e2m l\u00e0 trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i c\u1ea1nh c\u1ee7a tam gi\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 kho\u1ea3ng c\u00e1ch t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn m\u1ed7i \u0111\u1ec9nh b\u1eb1ng nhau v\u00e0 c\u0169ng ch\u00ednh b\u1eb1ng m\u1ed9t n\u1eeda \u0111\u1ed9 d\u00e0i c\u1ee7a c\u1ea1nh t\u01b0\u01a1ng \u1ee9ng.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Giao \u0111i\u1ec3m c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng trung tuy\u1ebfn<\/b><span style=\"font-weight: 400;\">: Tr\u1ecdng t\u00e2m l\u00e0 \u0111i\u1ec3m giao nhau c\u1ee7a ba \u0111\u01b0\u1eddng trung tuy\u1ebfn c\u1ee7a tam gi\u00e1c. \u0110i\u1ec1u n\u00e0y \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c t\u1eeb tr\u1ecdng t\u00e2m, b\u1ea1n c\u00f3 th\u1ec3 v\u1ebd ra ba \u0111o\u1ea1n th\u1eb3ng n\u1ed1i v\u1edbi ba trung \u0111i\u1ec3m c\u1ee7a tam gi\u00e1c t\u1ea1o ra ba \u0111o\u1ea1n \u0111\u01b0\u1eddng trung tuy\u1ebfn. \u0110\u1ed3ng th\u1eddi \u0111i\u1ec3m c\u1eaft c\u1ee7a 3 \u0111\u01b0\u1eddng trung tuy\u1ebfn, ng\u01b0\u1eddi ta g\u1ecdi \u0111\u00f3 l\u00e0 tr\u1ecdng t\u00e2m.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>T\u00e2m \u0111\u1ed1i x\u1ee9ng<\/b><span style=\"font-weight: 400;\">: Tr\u1ecdng t\u00e2m \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a tam gi\u00e1c. Hi\u1ec3u \u0111\u01a1n gi\u1ea3n, n\u1ebfu b\u1ea1n v\u1ebd m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn m\u1ed9t \u0111\u1ec9nh, th\u00ec n\u00f3 s\u1ebd chia tam gi\u00e1c th\u00e0nh hai ph\u1ea7n b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>T\u00e2m c\u00e2n c\u1ee7a tam gi\u00e1c \u0111\u1ec1u<\/b><span style=\"font-weight: 400;\">: Trong tam gi\u00e1c \u0111\u1ec1u, tr\u1ecdng t\u00e2m l\u00e0 t\u00e2m c\u00e2n, ngh\u0129a l\u00e0 n\u00f3 c\u00e1ch m\u1ed7i \u0111\u1ec9nh m\u1ed9t kho\u1ea3ng b\u1eb1ng nhau v\u00e0 \u0111\u1ed3ng th\u1eddi l\u00e0 \u0111i\u1ec3m giao nhau c\u1ee7a ba \u0111\u01b0\u1eddng trung tuy\u1ebfn.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-2.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-2-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-2-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-299101 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-2.jpg\" alt=\"trong-tam-la-gi-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m c\u1ee7a c\u00e1c h\u00ecnh tam gi\u00e1c \u0111\u1eb7c bi\u1ec7t<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Trong c\u00e1c b\u00e0i to\u00e1n, ch\u00fang ta s\u1ebd hay g\u1eb7p ph\u1ea3i nhi\u1ec1u \u0111\u1ec3 b\u00e0i y\u00eau c\u1ea7u x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m c\u1ee7a c\u00e1c lo\u1ea1i tam gi\u00e1c nh\u01b0: tam gi\u00e1c vu\u00f4ng, tam gi\u00e1c c\u00e2n, tam gi\u00e1c \u0111\u1ec1u,&#8230; Trong m\u1ed7i tam gi\u00e1c \u0111\u00f3, \u0111i\u1ec3m tr\u1ecdng t\u00e2m s\u1ebd th\u1ec3 hi\u1ec7n m\u1ed9t t\u00ednh ch\u1ea5t kh\u00e1c nhau. \u0110\u1ed3ng th\u1eddi, ch\u00fang c\u0169ng th\u1ec3 hi\u1ec7n m\u1ed9t gi\u00e1 tr\u1ecb \u0111\u1eb7c bi\u1ec7t m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o chi ti\u1ebft \u1edf n\u1ed9i dung b\u00ean d\u01b0\u1edbi.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m trong tam gi\u00e1c vu\u00f4ng<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m l\u00e0 g\u00ec trong tam gi\u00e1c vu\u00f4ng l\u00e0 m\u1ed9t \u0111i\u1ec3m s\u1edf h\u1eefu c\u00e1c t\u00ednh ch\u1ea5t v\u00f4 c\u00f9ng \u0111\u1eb7c bi\u1ec7t. \u0110\u1ec3 n\u1eafm r\u00f5 \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y, b\u1ea1n h\u00e3y c\u00f9ng ch\u00fang t\u00f4i xem qua c\u00e1c g\u1ee3i \u00fd v\u1ec1 t\u00ednh ch\u1ea5t c\u1ee7a \u0111i\u1ec3m tr\u1ecdng t\u00e2m trong tam gi\u00e1c vu\u00f4ng nh\u01b0 sau:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m trong tam gi\u00e1c vu\u00f4ng c\u0169ng l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a tam gi\u00e1c. \u0110\u1ed3ng th\u1eddi ch\u00fang c\u0169ng l\u00e0 trung \u0111i\u1ec3m c\u1ee7a c\u1ea1nh \u0111\u1ed1i di\u1ec7n g\u00f3c vu\u00f4ng. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u1ebfu b\u1ea1n v\u1ebd m\u1ed9t \u0111o\u1ea1n th\u1eb3ng t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn g\u00f3c vu\u00f4ng, n\u00f3 s\u1ebd chia c\u1ea1nh \u0111\u1ed1i di\u1ec7n th\u00e0nh hai ph\u1ea7n b\u1eb1ng nhau.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">V\u00ec tam gi\u00e1c vu\u00f4ng c\u00f3 m\u1ed9t g\u00f3c vu\u00f4ng v\u00e0 m\u1ed9t g\u00f3c 45 \u0111\u1ed9, tr\u1ecdng t\u00e2m c\u0169ng l\u00e0 trung \u0111i\u1ec3m c\u1ee7a c\u1ea1nh huy\u1ec1n (c\u1ea1nh ch\u1ee9a g\u00f3c vu\u00f4ng). \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u1ed9t t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t \u0111\u00f3 l\u00e0 tr\u1ecdng t\u00e2m v\u00e0 trung \u0111i\u1ec3m c\u1ee7a c\u1ea1nh huy\u1ec1n l\u00e0 m\u1ed9t \u0111i\u1ec3m duy nh\u1ea5t.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-3.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-3-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-3-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-299102 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-3.jpg\" alt=\"trong-tam-la-gi-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h3><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m trong tam gi\u00e1c c\u00e2n<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">D\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t c\u1ee7a tr\u1ecdng t\u00e2m l\u00e0 g\u00ec, \u0111i\u1ec3m tr\u1ecdng t\u00e2m t\u00e2m c\u1ee7a m\u1ed9t tam gi\u00e1c c\u00e2n c\u0169ng s\u1edf h\u1eefu nh\u1eefng t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t sau:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m l\u00e0 trung \u0111i\u1ec3m c\u1ee7a c\u1ea1nh \u0111\u1ed1i di\u1ec7n v\u1edbi \u0111\u1ec9nh c\u1ee7a tam gi\u00e1c c\u00e2n. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 kho\u1ea3ng c\u00e1ch t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn m\u1ed7i \u0111\u1ec9nh c\u1ee7a tam gi\u00e1c b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">V\u00ec tam gi\u00e1c c\u00e2n c\u00f3 \u0111\u1ed1i x\u1ee9ng tr\u1ee5c v\u1edbi \u0111\u01b0\u1eddng trung tuy\u1ebfn n\u00ean tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c n\u00e0y c\u0169ng l\u00e0 \u0111i\u1ec3m giao nhau c\u1ee7a ba \u0111\u01b0\u1eddng trung tuy\u1ebfn. Trong \u0111\u00f3, m\u1ed7i \u0111o\u1ea1n th\u1eb3ng t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn m\u1ed9t \u0111\u1ec9nh c\u1ee7a tam gi\u00e1c c\u00e2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t \u0111o\u1ea1n trung tuy\u1ebfn.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m l\u00e0 c\u0169ng l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a tam gi\u00e1c c\u00e2n, c\u00f3 ngh\u0129a l\u00e0 n\u1ebfu b\u1ea1n v\u1ebd m\u1ed9t \u0111o\u1ea1n th\u1eb3ng t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn m\u1ed9t \u0111\u1ec9nh, th\u00ec n\u00f3 s\u1ebd chia tam gi\u00e1c th\u00e0nh hai ph\u1ea7n b\u1eb1ng nhau.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-4.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-4-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-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-299103 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-4.jpg\" alt=\"trong-tam-la-gi-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h3><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m trong tam gi\u00e1c \u0111\u1ec1u<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">T\u01b0\u01a1ng t\u1ef1 nh\u01b0 t\u00ednh ch\u1ea5t tr\u1ecdng t\u00e2m l\u00e0 g\u00ec trong tam gi\u00e1c th\u01b0\u1eddng, trong tam gi\u00e1c \u0111\u1ec1u, \u0111i\u1ec3m \u0111\u1eb7t bi\u1ec7t c\u0169ng s\u1edf h\u1eefu m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t quan tr\u1ecdng sau:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Tr\u1ecdng t\u00e2m l\u00e0 \u0111i\u1ec3m giao nhau c\u1ee7a ba \u0111\u01b0\u1eddng trung tuy\u1ebfn trong tam gi\u00e1c \u0111\u1ec1u. C\u00e1c \u0111\u01b0\u1eddng trung tuy\u1ebfn n\u00e0y c\u0169ng l\u00e0 c\u00e1c \u0111o\u1ea1n th\u1eb3ng n\u1ed1i tr\u1ecdng t\u00e2m v\u1edbi c\u00e1c \u0111\u1ec9nh t\u01b0\u01a1ng \u1ee9ng. Do \u0111\u00f3, tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c \u0111\u1ec1u tr\u00f9ng v\u1edbi trung \u0111i\u1ec3m c\u1ee7a c\u00e1c \u0111\u1ec9nh c\u1ee7a tam gi\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 kho\u1ea3ng c\u00e1ch t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn m\u1ed7i \u0111\u1ec9nh c\u1ee7a tam gi\u00e1c \u0111\u1ec1u b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">\u0110i\u1ec3m tr\u1ecdng t\u00e2m l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a tam gi\u00e1c \u0111\u1ec1u. N\u1ebfu b\u1ea1n v\u1ebd m\u1ed9t \u0111o\u1ea1n th\u1eb3ng t\u1eeb tr\u1ecdng t\u00e2m \u0111\u1ebfn m\u1ed9t \u0111\u1ec9nh, th\u00ec n\u00f3 s\u1ebd chia tam gi\u00e1c th\u00e0nh hai ph\u1ea7n b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u00e1c g\u00f3c v\u00e0 c\u1ea1nh c\u1ee7a tam gi\u00e1c tr\u1ecdng t\u00e2m \u0111\u1ec1u c\u00f3 \u0111\u1ed9 d\u00e0i v\u00e0 \u0111\u1ed9 l\u1edbn b\u1eb1ng nhau. Do \u0111\u00f3, tr\u1ecdng t\u00e2m trong tam gi\u00e1c \u0111\u1ec1u c\u00f2n \u0111\u01b0\u1ee3c xem l\u00e0 \u0111i\u1ec3m th\u1ec3 hi\u1ec7n t\u00e2m \u0111\u01b0\u1eddng tr\u00f2n ngo\u1ea1i tuy\u1ebfn trong c\u00e1c b\u00e0i to\u00e1n.<\/span><\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-5.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-5-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-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-299104 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-5.jpg\" alt=\"trong-tam-la-gi-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h2><span style=\"font-weight: 400;\">C\u00e1c x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c tr\u1ecdng t\u00e2m trong tam gi\u00e1c<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Sau khi n\u1eb1m b\u1eaft \u0111\u01b0\u1ee3c t\u00ednh ch\u1ea5t v\u00e0 kh\u00e1i ni\u1ec7m v\u1ec1 tr\u1ecdng t\u00e2m l\u00e0 g\u00ec, \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t n\u00e0y, b\u1ea1n n\u00ean \u00e1p d\u1ee5ng 2 ph\u01b0\u01a1ng ph\u00e1p sau \u0111\u00e2y.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">C\u00e1ch 1: S\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Trong h\u00ecnh h\u1ecdc tam gi\u00e1c, vi\u1ec7c x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m l\u00e0 m\u1ed9t thao t\u00e1c v\u00f4 c\u00f9ng quan tr\u1ecdng \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3i ra \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i to\u00e1n. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c tr\u1ecdng t\u00e2m c\u1ee7a m\u1ed9t tam gi\u00e1c, s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc l\u00e0 \u0111i\u1ec1u b\u1ea1n kh\u00f4ng n\u00ean b\u1ecf qua. Theo ph\u01b0\u01a1ng ph\u00e1p \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3 s\u1eed tr\u1ecdng t\u00e2m G c\u1ee7a tam gi\u00e1c ABC c\u00f3 t\u1ecda \u0111\u1ed9 l\u00e0 (<\/span><span style=\"font-weight: 400;\">x<\/span><span style=\"font-weight: 400;\">G<\/span><span style=\"font-weight: 400;\">;<\/span><span style=\"font-weight: 400;\">y<\/span><span style=\"font-weight: 400;\">G<\/span><span style=\"font-weight: 400;\">) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n. \u0110\u1ea7u ti\u00ean, ch\u00fang ta t\u00ednh trung b\u00ecnh c\u1ed9ng t\u1ecda \u0111\u1ed9 c\u1ee7a c\u00e1c \u0111\u1ec9nh tam gi\u00e1c: <\/span><span style=\"font-weight: 400;\">x<\/span><span style=\"font-weight: 400;\">G<\/span><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">x<\/span><span style=\"font-weight: 400;\">A<\/span><span style=\"font-weight: 400;\"> + <\/span><span style=\"font-weight: 400;\">x<\/span><span style=\"font-weight: 400;\">B<\/span><span style=\"font-weight: 400;\"> + <\/span><span style=\"font-weight: 400;\">x<\/span><span style=\"font-weight: 400;\">C<\/span><span style=\"font-weight: 400;\">3<\/span><span style=\"font-weight: 400;\"> v\u00e0 <\/span><span style=\"font-weight: 400;\">y<\/span><span style=\"font-weight: 400;\">G<\/span><span style=\"font-weight: 400;\"> = <\/span><span style=\"font-weight: 400;\">y<\/span><span style=\"font-weight: 400;\">A<\/span><span style=\"font-weight: 400;\"> + <\/span><span style=\"font-weight: 400;\">y<\/span><span style=\"font-weight: 400;\">B<\/span><span style=\"font-weight: 400;\"> + <\/span><span style=\"font-weight: 400;\">y<\/span><span style=\"font-weight: 400;\">C<\/span><span style=\"font-weight: 400;\">3<\/span><span style=\"font-weight: 400;\">. C\u00f4ng th\u1ee9c n\u00e0y \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c tr\u1ecdng t\u00e2m n\u1eb1m \u1edf trung t\u00e2m kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a tam gi\u00e1c, v\u1edbi s\u1ef1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ed3ng \u0111\u1ec1u t\u1eeb c\u1ea3 ba \u0111\u1ec9nh.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-6.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-6-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-6-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-299105 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-6.jpg\" alt=\"trong-tam-la-gi-6\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-6.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-6-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-6-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc, ch\u00fang ta c\u00f2n c\u00f3 th\u1ec3 n\u1eafm b\u1eaft t\u00ednh ch\u1ea5t quan tr\u1ecdng kh\u00e1c. Tr\u1ecdng t\u00e2m c\u0169ng l\u00e0 \u0111i\u1ec3m giao nhau c\u1ee7a ba \u0111o\u1ea1n th\u1eb3ng trung tuy\u1ebfn trong tam gi\u00e1c ABC. Trong \u0111\u00f3, m\u1ed7i \u0111\u1ec9nh A, B, v\u00e0 C \u0111\u1ec1u k\u1ebft n\u1ed1i v\u1edbi tr\u1ecdng t\u00e2m G th\u00f4ng qua \u0111o\u1ea1n th\u1eb3ng trung tuy\u1ebfn t\u01b0\u01a1ng \u1ee9ng. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m G \u0111\u1eb7c bi\u1ec7t. \u0110\u00e2y l\u00e0 n\u01a1i c\u00e1c \u0111o\u1ea1n th\u1eb3ng trung tuy\u1ebfn g\u1eb7p nhau. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c t\u1ecda \u0111\u1ed9 c\u1ee7a G, ta c\u00f3 th\u1ec3 gi\u1ea3i h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh c\u1ee7a ba \u0111o\u1ea1n th\u1eb3ng trung tuy\u1ebfn n\u00e0y.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">C\u00e1ch 2: S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 h\u00ecnh h\u1ecdc<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n th\u1ed1ng kh\u00f4ng th\u1ec3 kh\u00f4ng nh\u1eafc \u0111\u1ebfn khi x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m \u0111\u00f3 ch\u00ednh l\u00e0 s\u1eed d\u1ee5ng th\u01b0\u1edbc k\u1ebb v\u00e0 compa. B\u1eb1ng c\u00e1ch n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111o \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh tam gi\u00e1c v\u00e0 t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh trung \u0111i\u1ec3m c\u1ee7a ch\u00fang. \u0110\u1ea7u ti\u00ean, s\u1eed d\u1ee5ng th\u01b0\u1edbc k\u1ebb \u0111\u1ec3 \u0111o \u0111\u1ed9 d\u00e0i c\u1ee7a c\u1ea1nh tam gi\u00e1c. Sau \u0111\u00f3, b\u1ea1n h\u00e3y v\u1ebd m\u1ed9t \u0111o\u1ea1n th\u1eb3ng qua trung \u0111i\u1ec3m c\u1ee7a c\u1ea1nh \u0111\u00f3 b\u1eb1ng compa. L\u1eb7p l\u1ea1i quy tr\u00ecnh n\u00e0y v\u1edbi c\u1ea3 ba c\u1ea1nh c\u1ee7a tam gi\u00e1c. Tr\u1ecdng t\u00e2m s\u1ebd l\u00e0 \u0111i\u1ec3m n\u01a1i c\u1ea3 ba \u0111o\u1ea1n th\u1eb3ng g\u1eb7p nhau, \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0111\u1ed3ng nh\u1ea5t gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng trung tuy\u1ebfn v\u00e0 ch\u00ednh x\u00e1c c\u1ee7a tr\u1ecdng t\u00e2m.<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-7.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-7-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-7-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-299106 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-7.jpg\" alt=\"trong-tam-la-gi-7\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-7.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-7-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-7-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i ra, ch\u00fang ta c\u0169ng c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00f4ng ngh\u1ec7 \u0111\u1ec3 t\u00ednh to\u00e1n tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c ph\u1ea7n m\u1ec1m \u0111\u1ed3 h\u1ecda ho\u1eb7c c\u00f4ng c\u1ee5 t\u00ednh to\u00e1n, ng\u01b0\u1eddi d\u00f9ng ch\u1ec9 c\u1ea7n nh\u1eadp t\u1ecda \u0111\u1ed9 c\u1ee7a ba \u0111\u1ec9nh tam gi\u00e1c. C\u00e1c ph\u1ea7n m\u1ec1m n\u00e0y s\u1ebd t\u1ef1 \u0111\u1ed9ng th\u1ef1c hi\u1ec7n quy tr\u00ecnh t\u00ednh to\u00e1n ph\u1ee9c t\u1ea1p, \u0111\u01b0a ra t\u1ecda \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a tr\u1ecdng t\u00e2m. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 ti\u1ebft ki\u1ec7m th\u1eddi gian m\u00e0 c\u00f2n gi\u1ea3m nguy c\u01a1 sai s\u00f3t trong qu\u00e1 tr\u00ecnh \u0111o v\u00e0 t\u00ednh to\u00e1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi c\u00e1c tam gi\u00e1c c\u00f3 h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p v\u00e0 khi\u1ebfn cho qu\u00e1 tr\u00ecnh x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m l\u00e0 g\u00ec trong tam gi\u00e1c c\u1ee7a b\u1ea1n g\u1eb7p kh\u00f3 kh\u0103n.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">V\u00ed d\u1ee5 c\u00e1c b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn t\u00ednh ch\u1ea5t tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c<\/span><\/h2>\n<p><b>\u0110\u1ec1 b\u00e0i<\/b><span style=\"font-weight: 400;\">: Cho tam gi\u00e1c c\u00f3 c\u00e1c \u0111\u1ec9nh l\u00e0 A, B, C. Tam gi\u00e1c n\u00e0y c\u00f3 \u0111\u01b0\u1eddng tung tuy\u1ebfn l\u00e0 AD b\u1eb1ng 9 cm. B\u1ea1n h\u00e3y x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m l\u00e0 g\u00ec v\u00e0 t\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AI?<\/span><\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-9.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-9-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/trong-tam-la-gi-9-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-299121 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-9.jpg\" alt=\"trong-tam-la-gi-9\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-9.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-9-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/trong-tam-la-gi-9-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p><b>L\u1eddi gi\u1ea3i<\/b><span style=\"font-weight: 400;\">: Theo \u0111\u1ec1 b\u00e0i vi\u1ebft, ch\u00fang ta s\u1ebd v\u1ebd th\u00eam m\u1ed9t \u0111\u01b0\u1eddng trung tuy\u1ebfn t\u1eeb \u0111\u1ec9nh B c\u1eaft c\u1ea1nh AC. \u0110i\u1ec3m c\u1eaft b\u1ea1n s\u1ebd gi\u1ea3i s\u1eed c\u00f3 t\u00ean E. Do \u0111\u00f3, ch\u00fang ta s\u1ebd c\u00f3 th\u00eam m\u1ed9t \u0111\u01b0\u1eddng trung tuy\u1ebfn l\u00e0 BE. Trong \u0111\u00f3, \u0111i\u1ec3m giao nhau c\u1ee7a hai \u0111\u01b0\u1eddng trung tuy\u1ebfn ch\u00ednh l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a h\u00ecnh tam gi\u00e1c n\u00e0y (g\u1ecdi l\u00e0 I).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Theo t\u00ednh ch\u1ea5t c\u01a1 nh\u1ea5t c\u1ee7a \u0111\u01b0\u1eddng trung tuy\u1ebfn, \u201c\u0110\u01b0\u1eddng trung tuy\u1ebfn s\u1ebd b\u1eb1ng \u2154 \u0111\u1ed9 d\u00e0i t\u1eeb \u0111\u1ec9nh \u0111\u1ebfn tr\u1ecdng t\u00e2m c\u1ee7a gi\u00e1c\u201d. Nh\u01b0 v\u1eady, ta c\u00f3 AD = 9cm =&gt; AI = \u2154 x 9 = 6 cm. Do \u0111\u00f3, \u0111\u00e1p \u00e1n c\u1ea7n t\u00ecm cho \u0111\u1ec1 b\u00e0i tr\u00ean \u0111\u00f3 l\u00e0 AI d\u00e0i 6cm.<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">Nh\u00ecn chung, b\u00e0i vi\u1ebft h\u00f4m nay c\u1ee7a <\/span><\/i><b><i>Ho\u00e0ng H\u00e0 Mobile <\/i><\/b><i><span style=\"font-weight: 400;\">c\u0169ng \u0111\u00e3 tr\u00ecnh b\u00e0y r\u00f5 r\u00e0ng v\u1ec1 <\/span><\/i><b><i>tr\u1ecdng t\u00e2m l\u00e0 g\u00ec<\/i><\/b><i><span style=\"font-weight: 400;\"> v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t c\u1ee7a \u0111i\u1ec3m n\u00e0y trong tam gi\u00e1c. Hy v\u1ecdng v\u1edbi b\u00e0i gi\u1ea3i b\u00ean tr\u00ean, qu\u00fd b\u1ea1n \u0111\u1ecdc s\u1ebd n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c c\u00e1ch x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m v\u00e0 ho\u00e0n th\u00e0nh \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i to\u00e1n v\u1ec1 h\u00ecnh h\u1ecdc c\u0103n b\u1ea3n t\u1ea1i l\u1edbp. Ch\u00fac b\u1ea1n s\u1ebd c\u00f3 m\u1ed9t th\u00e0nh t\u00edch xu\u1ea5t s\u1eafc trong h\u1ecdc k\u1ef3 n\u00e0y.<\/span><\/i><\/p>\n<p><span style=\"font-weight: 400;\">XEM TH\u00caM<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/duong-trung-tuyen-la-gi\/\">\u0110\u01b0\u1eddng trung tuy\u1ebfn l\u00e0 g\u00ec? T\u00ednh ch\u1ea5t, c\u00f4ng th\u1ee9c v\u00e0 b\u00e0i t\u1eadp t\u00ednh \u0111\u01b0\u1eddng trung tuy\u1ebfn<\/a><\/strong><\/li>\n<li style=\"font-weight: 400;\"><strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/dien-tich-hinh-vuong\/\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng ch\u00ednh x\u00e1c nh\u1ea5t<\/a><\/strong><\/li>\n<li style=\"font-weight: 400;\"><strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/so-thuc-la-gi\/\">S\u1ed1 th\u1ef1c l\u00e0 g\u00ec? M\u1ed9t s\u1ed1 d\u1ea1ng to\u00e1n h\u1ecdc ph\u1ed5 bi\u1ebfn v\u1ec1 s\u1ed1 th\u1ef1c<\/a><\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Tr\u1ecdng t\u00e2m tam gi\u00e1c l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n nh\u01b0ng v\u00f4 c\u00f9ng quan tr\u1ecdng trong l\u0129nh v\u1ef1c h\u00ecnh h\u1ecdc. \u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 trung \u0111i\u1ec3m \u0111\u01a1n thu\u1ea7n c\u1ee7a tam gi\u00e1c, m\u00e0 c\u00f2n l\u00e0 v\u1ecb tr\u00ed ch\u1ee9a nhi\u1ec1u t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t. Ch\u00fang c\u00f2n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau [&hellip;]<\/p>\n","protected":false},"author":101,"featured_media":299099,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-299098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>T\u00ednh ch\u1ea5t c\u1ee7a tr\u1ecdng t\u00e2m v\u00e0 c\u00e1ch x\u00e1c \u0111\u1ecbnh tr\u1ecdng t\u00e2m tam gi\u00e1c<\/title>\n<meta name=\"description\" content=\"Tr\u1ecdng t\u00e2m l\u00e0 g\u00ec? \u0110i\u1ec3m n\u00e0y c\u00f3 t\u00ednh ch\u1ea5t nh\u01b0 th\u1ebf n\u00e0o v\u00e0 l\u00e0m sao \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh? 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