回複：ZT：平麵上7個點（3星）

來源: jjmmjj 於 2009-07-03 06:52:26 [] [舊帖] [給我悄悄話] 閱讀數 : (226 bytes)

A. 3 points form a triangle with each edge of 1.
B. 4 points form a square with each edge of 1.
place A and B at a plane separated far enough that any point in one group to any point of another group is large than 1.

請您先登陸，再發跟帖！