回复：Please see the details inside.

来源: -闲云野鹤- 于 2009-09-21 07:59:05 [] [旧帖] [给我悄悄话] 阅读数 : (91 bytes)

there is an easier way to see that - try to fit the triangle into the circle of diameter 10

请您先登陆，再发跟帖！