Q109 of 113 Page 128

In Fig. 5.62, state which pair of lines are parallel. Give reason.

Supplement of 120⁰ = 60⁰

So the transversal l meets the line m and n forming an angle of 60⁰ on the same side of transversal

Therefore this two angles are corresponding pairs

Hence m and n are parallel

107

In Fig. 5.60, two parallel lines l and m are cut by two transversals n and p. Find the values of x and y.

108

In Fig. 5.61, l, m and n are parallel lines, and the lines p and q are also parallel. Find the values of a, b and c.

110

In Fig. 5.63, examine whether the following pairs of lines are parallel or not:

(i) EF and GH (ii) AB and CD

111

In Fig. 5.64, find out which pair of lines are parallel: