不知道这个解是不是超纲

来源: 于 2024-01-13 19:26:04 [旧帖] [给我悄悄话] 本文已被阅读：次

Draw line AB, CD. It can be seen that triangle AEP is divided into 5 equal pieces. Shaded area = area(AEP)*4/5=9*4/5=36/5