2x3.14xR=157x0.4
R=10
王聪圆形喷泉的外沿走了一圈,一共走了157步,每部的长度是0.4米这个圆形喷泉的半径是多少米?
王聪圆形喷泉的外沿走了一圈,一共走了157步,每部的长度是0.4米这个圆形喷泉的半径是多少米?
数学人气:739 ℃时间:2020-05-22 07:17:33
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