Sorry maybe this is a mental block, but...

來源: 於 2010-07-21 19:31:38 [舊帖] [給我悄悄話] 本文已被閱讀：次

A reflex angle is bigger than 180. When you draw lines on an arc, they are zig-zaged, which means the angles are definitely 1 reflex following by 1 non-reflex. Am I missing something here?