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[几何] 不利用球的体积怎么求球的表面积

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hjfmhh posted 2024-5-11 15:05 |Read mode
人教A版新教材是告诉你球的表面积,利用表面积求球的体积。那么不利用球的体积怎么求球的表面积呢?

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hejoseph posted 2024-5-11 15:12
以前教材的推导
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实际上就是阿基米德法  posted 2024-5-12 12:04

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original poster hjfmhh posted 2024-5-11 19:02
Last edited by hjfmhh 2024-5-11 19:11谢谢,预备定理是什么,能贴一下吗?

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hejoseph posted 2024-5-11 23:12
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original poster hjfmhh posted 2024-5-12 21:54

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力工 posted 2024-5-13 14:18
大神,我只乱插一嘴。如果找到一个用祖geng原理推导表面积的方法,那就棒了。

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