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85问答库 > 正方形周长和圆的周长相等，那么正方形边长比圆的直径

正方形周长和圆的周长相等，那么正方形边长比圆的直径

2025-03-29 12:57:59

推荐回答（4个）

回答1：

设正方形的边长、圆的直径都是d，
则正方形的周长：c=4d，
圆的周长：c=πd，
4d≠πd，即正方形的周长和圆的周长不相等．
故答案为：×．

回答2：

∵正方形周长4a=2πr
∴r=2a/π
正方形的边长=a
∴圆直径=4a/π
∵4>π
∴4a/π>a
∴选b

回答3：

正方形边长比圆的直径.短

回答4：

这个选B.短

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