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191问答库 > 一个直径245的圆分8等份每等分是多少！求怎么计算

一个直径245的圆分8等份每等分是多少！求怎么计算

2025-03-16 03:27:22

推荐回答（3个）

回答1：

1/8圆周长：2πr/8=πr/4=πd/8
=3.14*245/8
≈96.1625
1/8圆面积：πr²/8=3.14*122.5²/8
≈5889.95312

回答2：

先求圆的面积，然后再除以8就可以了啊，面积等于π乘以半径的平方

回答3：

S=π(245/2)^2÷8
=3.14*15006.25÷8
=5890

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