Question

[你混過 vulnerable 他 難怪歐長]

Cho tam giac ABC (AB>AC).M la trung diem cua BC.Duong thang qua M va vuong goc voi tia phan giac cua goc A tai H cat AB,AC lan luot tai E,F

a,CM H la trung diem EF va EF^2/4+AH^2=AE^2=AF^2

b,CM goc ACB=2*goc BME+ goc ABC

c, CM BE=CF

help me

Answer 1

[Anh Kiên lớp 7 Lê]

cho tam giac abc vuong c co goc a=60do ,tia phan giac goc a cat bc o e.ke ekvuong goc voi bc,bdvuonh goc voi ae.cm:

a)ak=kb

b)ad=bc