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tramy01022002
2 năm trước
Giúp mik nha mik cho 5 sao + câu trả lời hay Cho tam giác ABC. Gọi M, N lần lượt là trung điểm của các cạnh AC, AB. Trên Các đường thẳng BM và CN lần lượt lấy các điểm D và E sao cho M là trung điểm BD và N là trung điểm EC. Chứng minh ba điểm E, A, D thẳng hàng
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