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85问答库 > 用圆规画一个直径是6厘米的圆，那么圆规两脚之间的距离应是多少厘米？所画的这个圆的周长是多少厘米？

用圆规画一个直径是6厘米的圆，那么圆规两脚之间的距离应是多少厘米？所画的这个圆的周长是多少厘米？

还有一点：面积是多少平方厘米？，谢谢你们了俶

2025-03-16 17:52:01

推荐回答（2个）

回答1：

①6÷2=3(厘米)
圆规两脚之间的距离是3厘米。
②3.14×6=18.84(厘米)
这个圆的周长是18.84厘米。
③3.14×3×3=28.26(平方厘米)
这个圆的面积是28.26平方厘米。

回答2：

两脚距离就是半径＝3厘米。周长2πr等于6π。面积πr*r＝9π

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