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tailuu2001
2 năm trước
cho tam giác abc ,m là trung điểm của bc , n là trung điểm CA a, tính tỉ số diện tích tam giác abm và tam giác amn b, tính tỉ số diện tích tam giác abn và bnm các bạn giúp mình với toán gmath đó
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