回复：平面上的点（1）

As the staight lines which connect to each other can't occupy all plane,we can choise origin such that it is not on these lines and all points are in Quadraunt 1,2.Connecting all points to origin.we get 2n lines with diferent slopes,m1

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• Great！ --梦回汉朝-- ♀ (0 bytes) () 03/09/2005 postreply 11:41:09

• 回复：Great！Ge Pi -ohiotogo- ♀ (277 bytes) () 03/09/2005 postreply 20:11:43

• 回复：Great！Fan Li -ohiotogo- ♀ (34 bytes) () 03/09/2005 postreply 20:15:19

• 回复：Great！sorry, it was great -ohiotogo- ♀ (107 bytes) () 03/09/2005 postreply 20:17:29