The problem

来源: 于 2003-07-03 12:57:00 [旧帖] [给我悄悄话] 本文已被阅读：次

If I give you a surface (not flat) and a triangle, can you find 3 points on the surface to form a triangle that is "similar" to the one I give you. The answer is yes. But you have to tell me the reason.