T
tieuthu_bongbong


Cho tam giac deu ABC . Tren tia doi cua tia BC lay diem D , tren tia doi cua tia BC lay diem E sao cho BD=CE=BC
a) C/m tam giac ADE can
b) Tinh goc DAE




giup minh giai nhanh nha=((=((=((
a) C/m tam giac ADE can
b) Tinh goc DAE