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antung22223
2 năm trước
Một mảnh đất hình tam giác độ dài đáy 25 m. Nếu kéo dài độ dài đáy này thêm 2,5m thì diện tích mảnh đất tăng thêm 22,5m2. Tính diện tích mảnh đất?
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