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

In Fig. 5.16, PA || BC || DT and AB || DC. Then, the values of a and b are respectively.

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

In Fig. 5.18, a and b are

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