Two lines and are cut by a transversal

MATHEMATICS · Single correct · CBSE · Mathematics · Lines and Angles · Lines and Angles

Problem

Two lines

k

and

l

are cut by a transversal

m

, forming interior angles

\angle A

and

\angle B

on the same side of

m

. Which of the following conditions is sufficient to conclude that

k \parallel l

? (a)

\angle A = \angle B

(b)

\angle A + \angle B = 90^\circ

(c)

\angle A + \angle B = 180^\circ

(d)

\angle A - \angle B = 90^\circ