不知道這個解是不是超綱
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
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