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hanhquyenynp
2 năm trước
Bài 4: Cho ΔABC cân tại A. M là trung điểm của cạnh AB. Vẽ D sao cho B là trung điểm của AD. Chứng minh CD =2cm Mn làm hộ e bài này vs . E đánh giá 5 sao nha
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