如图,八边形的8个内角都是135°,已知AB=EF,BC=20,DE=10,FG=30,AH的长度是7[4A.[3P9I1w1I7`*r(z+R4p/c)x。6b2L*l)s7l6C8_+^5|4D
6b2L*l)s7l6C8_+^5|4D