Question

show that opposite angles of a parallogram are equal

Answer 1

They r equal bcz. Opposite sides r parallel to each other that is why opposite angles r equal.
Plz mark as brainist

Answer 2

Let ABCD be a parallelogram.
Draw it's diagonal AC.
In ∆ABC and ∆ CDA, we have:
Two traiangles both are equal and
Angles A is equal to angle C
Angle B is equal to angle D
Proved.