Answer:
angle 1=20 degrees
angle 2=70 degrees
angle 3=20 degrees
angle BAD=140 degrees
angle ADC=40 degrees
perimeter of ABCD=43.08
Step-by-step explanation:
segment AB^2=(8/2)^2+(20/2)^2
AB^2=16+100=116
AB=10.77
perimeter=4(AB)=4(10.77)=43.08
