Question

The figure given below shows a pair of parallel lines cut by a transversal for the following case, find a and b, giving reason.

Answer 1

∵ l || m and p intersects them

b + 60° = 180°     (Linear pair)

∴ b = 180° - 60° = 120°

and a = 60°    (corresponding angle)

∴ a = 60°, b = 120°