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nbaotran213
1 năm trước
Một mảnh vườn hình tam giác có diện tích 567 m ². Nếu mở rộng cạnh đáy thêm 6 m thì diện 72 m ². Tính độ dài đáy của mảnh đất ban đầu? Mọi người làm chi tiết nha! Em cảm ơn.
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