Cho tam giác ABC có diện tích 60cm2
. Trên BC lấy điểm M sao cho BM=CM.
Nối A với M. Trên AM...
![subject](/tpl/images/cats/mat.png)
Mathematics, 23.07.2021 14:10 ButterflyEVE
Cho tam giác ABC có diện tích 60cm2
. Trên BC lấy điểm M sao cho BM=CM.
Nối A với M. Trên AM lấy điểm D sao cho AD=DM. Nối B với D, C với D.
i) Liệt kê tất cả các tam giác có trong hình vẽ. Trong các tam giác trên, những tam giác nào
có diện tích bằng nhau. Vì sao?
ii) Kéo dài BD cắt AC tại E. Tính diện tích tam giác ABE
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