Shade 87.5% of the area of the rectangle. explain 87.5% by 7

Shade 87.5% of the area of the rectangle. explain 87.5% by 72 is 63
十万火急,要英文的.快啊.谢谢!

laser626 1年前已收到1个回答举报

共回答了17个问题采纳率：88.2% 举报

Cut the rectangle into 8 triangles ,then shade 7 pieces of them.
If each triangle stand for 9 ,then 7 pieces is 63 ,and the whole rectangle is 72.
So 87.5% by 72 is 63 .

1年前

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