Question

Prove that if two lines intersect, then the vertically opposite angles are equal.​

Answer 1

♠Answer♠

∠COB=180∘−∠BOD ---(1). Now, let us consider the angles on the line AB. So, we get ∠COB+∠AOC=180∘ ---(2). ... So, we have proved that if two lines intersect each other, then the vertically opposite angles are equal.

Hope it's helpful for you

And please mark me as brainlest