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An exercise ball is made from soft elastic that has uniform thickness of 2 millimeters, and the interior of the ball is filled with air. The ball is in the shape of a sphere and has an exterior diameter of 65 centimeters. What is the radius of the interior of the ball, in millimeters?
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· 相关考点
4.5.1 圆的弦长 2.5.1 单位换算
4.5.1 圆的弦长
2.5.1 单位换算
以上解析由 考满分老师提供。
