Q113 of 113 Page 128

In Fig. 5.66, two parallel lines l and m are cut by two transversals p and q. Determine the values of x and y.

y + 80⁰ = 180⁰ (Co- interior angles)

⇒ y = 100⁰

x = 110⁰ (Alternate interior angles)

x = 110⁰, y = 100⁰

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

110

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

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

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

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In Fig. 5.65, show that

(i) AB || CD

(ii) EF || GH