正方形的面积是8平方米，求阴影图形面积。该怎么算？

数学题解答：此题的关键，是找出正方形与圆之间的联系。

正方形的边长，恰好就是圆的半径。

正方形的面积是8，说明边长的平方是８，也就是半径的平方也是８。

所以3.14*8=25.12就是圆的面积。

最后我们用正方形的面积减去其中的小扇形的面积，就是阴影部分的面积：

８－25.12÷４=1.72（平方厘米）

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