Cho tam giác ABC; BM, CN đường cao. Vẽ BE vuông góc MN tại E, vẽ CF vuông MN tại F, gọi P trung điểm BC. Chứng minh:
a) Tam giác NPM cân tại P
b) NE = MF
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
bài 2:
ta có: AB<AC<BC(Vì 3cm<4cm<5cm)
=> góc C>góc A> góc B (Các cạnh và góc đồi diện trong tam giác)
Bài 3:
*Xét tam giác ABC, có:
góc A+góc B+góc c= 180 độ( tổng 3 góc 1 tam giác)
hay góc A+60 độ +40 độ=180độ
=> góc A= 180 độ-60 độ-40 độ.
=> góc A=80 độ
Ta có: góc A>góc B>góc C(vì 80 độ>60 độ>40 độ)
=> BC>AC>AB( Các cạnh và góc đối diện trong tam giác)
bài 2:
ta có: AB <AC <BC (Vì 3cm <4cm <5cm)
=> góc C>góc A> góc B (Các cạnh và góc đồi diện trong tam giác)
Bài 3:
*Xét tam giác ABC, có:
góc A+góc B+góc c= 180 độ( tổng 3 góc 1 tam giác)
hay góc A+60 độ +40 độ=180độ
=> góc A= 180 độ-60 độ-40 độ.
=> góc A=80 độ
Ta có: góc A>góc B>góc C(vì 80 độ>60 độ>40 độ)
=> BC>AC>AB( Các cạnh và góc đối diện trong tam giác)
HT mik làm giống bạn Dương Mạnh Quyết
https://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.htmlhttps://olm.vn/hoi-dap/detail/239868952049.html
cho tam giác ABC=tam giác DEF và tam giác DEF = tam giác HIK. chứng minh tam giác ABC = tam giác HIK
Ta có: tam giác ABC=tam giác DEF (1)
và tam giác DEF = tam giác HIK (2)
Từ (1) và (2) => tam giác ABC = tam giác HIK
cho tam giác ABC=tam giác DEF và tam giác DEF = tam giác HIK. chứng minh tam giác ABC = tam giác HIK
Biết tam giác abc bằng tam giác DEF, tg DEF = tg HIK suy ra tam giác ABC = tam giác HIK
xet tam giac BNC vuong o N co NP la duong trung tuyen (P la TD cua BC )
=> NP =BP =PC (tinh chat ) (1)
xet tg BMC vuong o M co MP la duong trung tuyen ( P la TD cua BC )
=> MP= BP= PC ( tinh chat ) (2)
tu (1,2) =>NP =MP => tg NPM can o P
còn câu b giúp mình vs