圆的直径为10半径为5,那么面积πr^2=25π
25π/10^2
一张正方形纸的边长是10厘米,现从这张纸上剪下一个最的圆,圆的面积是正方形的( )%.
一张正方形纸的边长是10厘米,现从这张纸上剪下一个最的圆,圆的面积是正方形的( )%.
数学人气:630 ℃时间:2019-12-13 04:37:06
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