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vothinhieu333
2 năm trước
Biết trung bình số đo mỗi cạnh hình tm giác là 4m5cm , trung bình số đo mỗi cạnh hình tam giác là 31 dm . Hỏi chu vi hình tam giác và chu vi hình tứ giác là bao nhiêu cm
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