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Kunphuc123
2 năm trước
Cho ΔABC, điểm D thuộc cạnh BC. Gọi M là trung điểm của AD. Trên tia đối của tia MB lấy điểm E sao cho ME = MB. Trên tia đối của tia MC lấy F sao cho MF = MC. Chứng minh A. AE = BD; B. AF//BC; C. Ba điểm A, E, F thẳng hàng
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