In the given figure, line l and m are parallel to each otherand a transversal t cuts them. If ∠1 = 60°, then measure of ∠3 and ∠6 respectively is
60°, 60°
60°. 120°
120°, 60°
120°, 120°
∠1 = ∠3 = 60° (vertically opposite angle)
From the theorem
∠3 + ∠6 = 180°
60° + ∠6 = 180°
So,
∠6 = 120°