回复：回复：回复：回复：求助：谁能帮我一下？

来源: 于 2010-03-28 17:41:40 [旧帖] [给我悄悄话] 本文已被阅读：次

I'm sorry,but you're not right.If h=r A should be pie*r*r/2. Your formula A=r*r