Nkọwa na akụrụngwa nke etiti nke triangle aka nri

N'isiokwu a, anyị ga-atụle nkọwa na ihe onwunwe nke etiti nke triangle ziri ezi na-adọta na hypotenuse. Anyị ga-enyochakwa ihe atụ nke idozi nsogbu iji mee ka ihe ọmụmụ ahụ sie ike.

Na-ekpebi etiti triangle ziri ezi

Median bụ akụkụ ahịrị nke jikọtara vertex nke triangle na etiti nke akụkụ nke ọzọ.

Triangle ziri ezi bụ triangle nke otu akụkụ ziri ezi (90°) na nke ọzọ bụ nnukwu (<90°).

Njirimara nke etiti triangle ziri ezi

Ngwongwo 1

Ọkara (AD) na triangle ziri ezi e si na vertex nke akụkụ aka nri (∠LACmaka hypotenuse (BC) bụ ọkara hypotenuse.

• BC = 2 AD
• AD = BD = DC

N'ihi: Ọ bụrụ na etiti ahụ hà nhata ọkara nke akụkụ nke a na-adọta ya, mgbe ahụ, akụkụ a bụ hypotenuse, na triangle dị n'akụkụ aka nri.

Ngwongwo 2

Ihe etiti a na-adọta na hypotenuse nke triangle ziri ezi bụ ọkara mgbọrọgwụ nke nchikota nke akụkụ ụkwụ ụkwụ.

Maka triangle anyị (lee foto dị n'elu):

Ọ na-abịa site na Ngwongwo 1.

Ngwongwo 3

Ọkpụkpụ a gbadara na hypotenuse nke triangle ziri ezi hà nhata radius nke gburugburu gbara gburugburu triangle ahụ.

Ndị ahụ. BO bụ ma etiti na radius.

Cheta na: Ọdabara na triangle ziri ezi, n'agbanyeghị ụdị triangle.

Ọmụmaatụ nke nsogbu

Ogologo etiti etiti a na-adọta na hypotenuse nke triangle ziri ezi bụ 10 cm. Na otu n'ime ụkwụ bụ 12 cm. Chọta gburugburu nke triangle.

ngwọta

hypotenuse nke triangle, dị ka ndị a si Ngwongwo 1, okpukpu abụọ nke etiti. Ndị ahụ. ọ hà: 10 cm ⋅ 2 = 20 cm.

Iji Pythagorean theorem, anyị na-ahụ ogologo nke abụọ ụkwụ (anyị na-ewere ya dị ka "B", Ụkwụ a ma ama - maka "iji", hypotenuse - maka “Na”):

b² =c² - na² = 20² - 12² = 256.

N'ihi ya, b = 16 sentimita.

Ugbu a, anyị maara ogologo nke akụkụ niile na anyị nwere ike gbakọọ perimeta nke ọnụ ọgụgụ:

P_△ = 12 cm + 16 cm + 20 cm = 48 cm.