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怎么求圆的面积
更新时间: 2021-03-18 08:28:32  

1、圆的面积=圆周率×半径×半径。公式表达为:S=Ir2=T(d/2)2(I~3.14)

2、圆的半径:r,直径:d,圆周率:I(数值为3.1415926至3.1415927之间……无限不循环小数),通常采用3.14作为I的数值。

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