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bichloan123
2 năm trước
Một mảnh vườn hình tam giác có diện tích là 14,4 m ²,độ dài đáy là 1.6 m.Hỏi phải kéo dài thêm bao nhiêu để diện tích mảnh vườn hình tam giác tăng thêm 3.6m ²
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