Question

answer this plz its urgent

Answer 1

A)angle DCE=angle DCB+angle BCE
angle BAD=angle DCB.
THEREFORE we can replace angle DCB with angle BAD.
angle DCE=angle BAD + angle BCE.
HENSE PROVED.
C) it is a parallelogram as A=B=C.
SO BY THE PROPERTY OF parallelogram adjacent angles are equal to opposite side adjacent angles.
and therefore angle A +angle D= angle C + angle B.
thank you

Answer 2

Answer:

This 2 pictures is your answer