Question

In Fig. 5, AB is parallel to DC. Prove that ∠A = ∠D

Answer 1

Step-by-step explanation:

angle DCE=80(corresponding angles)

angle ACB=180-(40+80)(straight line)

=60

angle DEC=180-120=60(straight line)

angle A=180-(80+60)=40

angle D=180-(80+60)=40

A=D