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[几何] 将一个三棱台的各面延展成平面后可将空间分成几部分

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isee posted 2015-12-11 16:36 |Read mode
RT,数晕了。

请教。

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kuing posted 2015-12-11 17:46
看成两个平面截空间坐标系,本来8块,截一个平面时,只有一块没被切,故多了7块,再来一面,由于平行,也一样多7块,所以22

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original poster isee posted 2015-12-11 20:56
回复 2# kuing


    好,我先把答案记下来,哈哈哈。。。。

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色k posted 2015-12-12 01:09
比感觉上要多

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