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phuongnamkk


Cho tam giac ABC.Goi NM lan luot la trung diem cua AB va AC.tren tia doi cua tia Mb va Nc la 2 diem D va E sao cho MD=MB,NE=NC
a, Chung minh AD=AE
b,3 diem A,E,D thang hang
Ai biet chi minh qua yahoo congtu_deptrai_yeuai@yahoo.com nhe!
a, Chung minh AD=AE
b,3 diem A,E,D thang hang
Ai biet chi minh qua yahoo congtu_deptrai_yeuai@yahoo.com nhe!
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