Question

If two lines intersects each other then prove that 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.