Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Tr\u1ef1c t\u00e2m l\u00e0 g\u00ec? Tr\u1ef1c t\u00e2m hay tr\u1ef1c t\u00e2m trong tam gi\u00e1c \u0111\u1ec1u l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a> m\u00e0 b\u1ea5t k\u1ef3 ai c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n<\/a> h\u1ecdc trung h\u1ecdc c\u01a1 s\u1edf. \u0110\u1ec3 hi\u1ec3u th\u00eam v\u1ec1 kh\u00e1i ni\u1ec7m, t\u00ednh ch\u1ea5t v\u00e0 c\u00e1ch x\u00e1c \u0111\u1ecbnh, qu\u00fd b\u1ea1n \u0111\u1ecdc \u0111\u1eebng b\u1ecf l\u1ee1 b\u1ea5t k\u1ef3 n\u1ed9i dung th\u00f4ng tin n\u00e0o c\u00f3 trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n\n\n\n Tr\u1ef1c t\u00e2m l\u00e0 g\u00ec?<\/p>\n\n\n\n Tr\u1ef1c t\u00e2m l\u00e0 giao \u0111i\u1ec3m c\u1ee7a 3 \u0111\u01b0\u1eddng cao trong m\u1ed9t tam gi\u00e1c. \u0110\u01b0\u1eddng cao trong tam gi\u00e1c l\u00e0 \u0111o\u1ea1n vu\u00f4ng g\u00f3c, k\u1ebb t\u1eeb m\u1ed9t \u0111\u1ec9nh \u0111\u1ebfn c\u1ea1nh \u0111\u1ed1i di\u1ec7n. C\u1ea1nh \u0111\u1ed1i di\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u00e1y \u1ee9ng v\u1edbi \u0111\u01b0\u1eddng cao. \u0110\u1ed9 d\u00e0i c\u1ee7a \u0111\u01b0\u1eddng cao ch\u00ednh l\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa \u0111\u1ec9nh v\u00e0 \u0111\u00e1y.<\/p>\n\n\n\n \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh tr\u1ef1c t\u00e2m, kh\u00f4ng th\u1ec3 d\u1ef1a v\u00e0o m\u1eaft th\u01b0\u1eddng m\u00e0 ph\u1ea3i d\u1ef1a v\u00e0o d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft.<\/p>\n\n\n\n T\u00ednh ch\u1ea5t c\u1ee7a tr\u1ef1c t\u00e2m tam gi\u00e1c l\u00e0 g\u00ec?<\/p>\n\n\n\n Tr\u1ef1c t\u00e2m tam gi\u00e1c c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t nh\u01b0:<\/p>\n\n\n\n Kho\u1ea3ng c\u00e1ch t\u1eeb t\u00e2m \u0111\u01b0\u1eddng tr\u00f2n ngo\u1ea1i ti\u1ebfp tam gi\u00e1c \u0111\u1ebfn trung \u0111i\u1ec3m c\u1ea1nh n\u1ed1i hai \u0111\u1ec9nh c\u00f2n l\u1ea1i b\u1eb1ng 1\/2 kho\u1ea3ng c\u00e1ch t\u1eeb m\u1ed9t \u0111\u1ec9nh t\u1edbi tr\u1ef1c t\u00e2m.<\/p>\n\n\n\n N\u1ebfu nh\u01b0 tam gi\u00e1c \u0111\u00e3 cho l\u00e0 tam gi\u00e1c c\u00e2n th\u00ec \u0111\u01b0\u1eddng cao c\u0169ng \u0111\u1ed3ng th\u1eddi l\u00e0 \u0111\u01b0\u1eddng trung tuy\u1ebfn, \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c v\u00e0 \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111\u1ec9nh tam gi\u00e1c c\u00e2n \u0111\u00f3.<\/p>\n\n\n\n Trong tam gi\u00e1c \u0111\u1ec1u, tr\u1ef1c t\u00e2m \u0111\u1ed3ng th\u1eddi s\u1ebd l\u00e0 tr\u1ecdng t\u00e2m, t\u00e2m c\u1ee7a \u0111\u01b0\u1eddng tr\u1ecdn n\u1ed9i ti\u1ebfp v\u00e0 ngo\u1ea1i ti\u1ebfp c\u1ee7a tam gi\u00e1c \u0111\u00f3.<\/p>\n\n\n\n Theo \u0111\u1ecbnh l\u00fd Carnot: \u0110\u01b0\u1eddng cao c\u1ee7a tam gi\u00e1c \u1ee9ng v\u1edbi m\u1ed9t \u0111\u1ec9nh, c\u1eaft \u0111\u01b0\u1eddng tr\u00f2n ngo\u1ea1i ti\u1ebfp t\u1ea1i \u0111i\u1ec3m th\u1ee9 hai l\u00e0 \u0111\u1ed1i x\u1ee9ng c\u1ee7a tr\u1ef1c t\u00e2m qua c\u1ea1nh t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n C\u00e1ch x\u00e1c \u0111\u1ecbnh tr\u1ef1c t\u00e2m c\u1ee7a m\u1ed9t tam gi\u00e1c<\/p>\n\n\n\n V\u1edbi m\u1ed7i lo\u1ea1i tam gi\u00e1c s\u1ebd c\u00f3 c\u00e1ch x\u00e1c \u0111\u1ecbnh tr\u1ef1c t\u00e2m kh\u00e1c nhau, c\u1ee5 th\u1ec3:<\/p>\n\n\n\n Tam gi\u00e1c vu\u00f4ng: Tr\u1ef1c t\u00e2m ch\u00ednh l\u00e0 \u0111\u1ec9nh g\u00f3c vu\u00f4ng. V\u00ed d\u1ee5: Tam gi\u00e1c EFG c\u00f3 tr\u1ef1c t\u00e2m H tr\u00f9ng v\u1edbi g\u00f3c vu\u00f4ng E<\/p>\n\n\n\n Tam gi\u00e1c nh\u1ecdn: Tr\u1ef1c t\u00e2m s\u1ebd n\u1eb1m \u1edf b\u00ean trong mi\u1ec1n tam gi\u00e1c \u0111\u00f3. V\u00ed d\u1ee5 nh\u01b0: Tam gi\u00e1c nh\u1ecdn ABC c\u00f3 tr\u1ef1c t\u00e2m H n\u1eb1m \u1edf mi\u1ec1n tam gi\u00e1c \u0111\u00f3<\/p>\n\n\n\n Tam gi\u00e1c t\u00f9: Tr\u1ef1c t\u00e2m n\u1eb1m \u1edf ngo\u00e0i mi\u1ec1n tam gi\u00e1c<\/p>\n\n\n\n B\u00e0i t\u1eadp 1: Tr\u1ef1c t\u00e2m l\u00e0 giao c\u1ee7a ba \u0111\u01b0\u1eddng g\u00ec?<\/p>\n\n\n\n ba \u0111\u01b0\u1eddng trung tuy\u1ebfn.<\/p>\n\n\n\n ba \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c.<\/p>\n\n\n\n ba \u0111\u01b0\u1eddng cao.<\/p>\n\n\n\n ba \u0111\u01b0\u1eddng trung tr\u1ef1c.<\/p>\n\n\n\n G\u1ee3i \u00fd \u0111\u00e1p \u00e1n: C<\/p>\n\n\n\n B\u00e0i t\u1eadp 2: Cho tam gi\u00e1c ABC kh\u00f4ng vu\u00f4ng. G\u1ecdi H l\u00e0 tr\u1ef1c t\u00e2m.H\u00e3y ch\u1ec9 ra c\u00e1c \u0111\u01b0\u1eddng cao c\u1ee7a tam gi\u00e1c HBC v\u00e0 ch\u1ec9 ra tr\u1ef1c t\u00e2m c\u1ee7a tam gi\u00e1c \u0111\u00f3.<\/p>\n\n\n\n G\u1ee3i \u00fd \u0111\u00e1p \u00e1n:<\/p>\n\n\n\n G\u1ecdi D, E, F l\u00e0 ch\u00e2n c\u00e1c \u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c k\u1ebb t\u1eeb A, B, C c\u1ee7a \u0394ABC.<\/p>\n\n\n\n \u21d2 AD \u27d8 BC, BE \u27d8 AC, CF \u27d8 AB.<\/p>\n\n\n\n \u0394HBC c\u00f3 :<\/p>\n\n\n\n AD \u22a5 BC n\u00ean AD l\u00e0 \u0111\u01b0\u1eddng cao t\u1eeb H \u0111\u1ebfn BC.<\/p>\n\n\n\n BA \u22a5 HC t\u1ea1i F n\u00ean BA l\u00e0 \u0111\u01b0\u1eddng cao t\u1eeb B \u0111\u1ebfn HC<\/p>\n\n\n\n CA \u22a5 BH t\u1ea1i E n\u00ean CA l\u00e0 \u0111\u01b0\u1eddng cao t\u1eeb C \u0111\u1ebfn HB.<\/p>\n\n\n\n AD, BA, CA c\u1eaft nhau t\u1ea1i A n\u00ean A l\u00e0 tr\u1ef1c t\u00e2m c\u1ee7a \u0394HCB.<\/p>\n\n\n\n V\u1edbi c\u00e1c th\u00f4ng tin c\u00f3 trong b\u00e0i vi\u1ebft \u201cTr\u1ef1c t\u00e2m l\u00e0 g\u00ec? T\u00ednh ch\u1ea5t, c\u00e1ch x\u00e1c \u0111\u1ecbnh tr\u1ef1c t\u00e2m trong tam gi\u00e1c\u201d, s\u1ebd gi\u00fap \u00edch b\u1ea1n. N\u1ebfu c\u00f3 b\u1ea5t k\u1ef3 c\u00e2u h\u1ecfi, th\u1eafc m\u1eafc n\u00e0o c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p, qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y comment ph\u00eda d\u01b0\u1edbi, Vietlearn.org s\u1ebd h\u1ed7 tr\u1ee3 nhanh ch\u00f3ng.<\/p>\n\n\n\n <\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":" Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Tr\u1ef1c t\u00e2m l\u00e0 g\u00ec? Tr\u1ef1c t\u00e2m hay tr\u1ef1c t\u00e2m trong tam gi\u00e1c \u0111\u1ec1u l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n m\u00e0 b\u1ea5t k\u1ef3 ai c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc trung h\u1ecdc c\u01a1 s\u1edf. \u0110\u1ec3 hi\u1ec3u th\u00eam v\u1ec1 kh\u00e1i ni\u1ec7m, t\u00ednh ch\u1ea5t v\u00e0 c\u00e1ch x\u00e1c \u0111\u1ecbnh, qu\u00fd b\u1ea1n […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1],"tags":[],"class_list":["post-4120","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/4120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=4120"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/4120\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=4120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=4120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=4120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}