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好吧问答库 > 计算下面图形阴影部分的面积。

计算下面图形阴影部分的面积。

计算下面图形阴影部分的面积．（单位：厘米．）见图一

2025年04月07日 07:15

有1个网友回答

网友（1）：

（1）3.14×4² +4×4
=50.24+16
=66.24（平方厘米）
答：这个图形的面积是66.24平方厘米．

（2）3.14×（12÷2）² ÷2-12×（12÷2）÷2
=3.14×36÷2-12×6÷2
=56.52-36
=20.52（平方厘米）
答：阴影部分的面积是20.52平方厘米．

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