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【OG20-P152-44题】
If a sphere with radius r is inscribed in a cube with edges of length e, which of the following expresses the relationship between r and e ?
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分析B选项
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【答案】A
【解析】边长为e的正方体的内切球半径是r，所以e=2r，即r=(1/2 )e。
【知识点补充】
球嵌在正方体中(球与正方体内切)，则球的直径等于正方体的边长。
圆嵌在正方形中(圆与正方形内切)，则圆的直径等于正方形的边长。
emily666
edges of length 边长
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2020-05-28 21:13:35
wzzzming
题目：一个半径为r的球内切于一个边长为e的立方体内，问下列用r和e的表达式哪个正确？
因为球内切于立方体内，所以球的直径等于立方体边长，即2r=e
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2018-01-03 17:41:13
草民不敢回复wzzzming
不懂装懂，搞搞清楚发表言论。
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2018-06-18 10:23:29
疏雨残烟断桥雪回复 草民不敢
人家没说错啊 干嘛说话那么难听
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2018-08-06 22:27:14
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