任意三棱錐,至少存在一個頂點,其三條邊可以組成一個三角形。
所有跟帖:
• 試解 -monseigneur- ♂ (706 bytes) () 02/29/2024 postreply 23:13:08
• 試解 -monseigneur- ♂ (706 bytes) () 02/29/2024 postreply 23:13:08
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