Question

In the given figure, the directed lines are parallel to each other. Find the unknown angles.

Answer 1

∵ Lines are parallel

∴ c = 120°

a + 120° = 180° .......(co-interior angles)

∴ a = 180°− 120° = 60°

But a = b .........(vertically opposite angles)

∴ b = 60°

hence a = 60°, b = 60° and c = 120°