Q20 of 113 Page 128

In Fig. 5.18, a and b are

l is a transversal of the two line segments m and n


The angles a and b lies on the inner side of each line segment but on opposite sides of transversal. So the angles are known as alternate interior angles.

More from this chapter

All 113 →
18

The difference of two complementary angles is 30°. Then, the angles are

 19

In Fig. 5.17, PQ || SR and SP || RQ. Then, angles a and b are respectively

 21

If two supplementary angles are in the ratio 1 : 2, then the bigger angle is

 22

In Fig. 5.19, ∠ROS is a right angle and ∠POR and ∠QOS are in the ratio 1 : 5. Then, ∠QOS measures