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十萬火急..數學題..
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2007-01-11 2:10 am
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any graph provided?if there are just 3 pieces 紙板 in the form of square, then...
the area = 60^2+70^2+80^2 = 14900(cm^2)
參考: me...
2007-01-11 1:59 am
所需紙板的面積是3000cm2
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https://hk.answers.yahoo.com/question/index?qid=20070110000051KK02773