Yes, if you cut one corner of

来源: xyz100 于 2005-07-11 10:43:18 [] [旧帖] [给我悄悄话] 阅读数 : 0 (49 bytes)
本帖于 2005-07-11 15:48:01 时间, 由普通用户 海姑娘 编辑

a cube, it becomes 6+1=7 surfaces and 12+3=15 边.

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• sorry, didn't read Q carefully -xyz100- ♂ 给 xyz100 发送悄悄话 (0 bytes) () 07/11/2005 postreply 10:52:22

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