BTW
1. In has ten qué bring when DABC
mist tam grad i 3 diul la M,N,P.
Hay that ki hien we by being their 2
tam grać baxt  = Ñ v AC = MN
2, Cho SABC=DDEF. Tin chui
Min mor tan gai bat HB = 6 cm, A(= 84
EF = 10mm.
3, Chu SABC=ADEF biet A+ 13 = 130°
ESE Tính các góc mới tam giác
tạng