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In Fig. 6.31, if P Q || S T ,/P Q R=110^...

In Fig. 6.31, if `P Q || S T ,``/_P Q R=110^@``\ a n d ``/_R S T=130^@`, find `/_Q R S`.

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Interior angles on the same side of the transversal:The pair of interior angles on the same side of the transversal are called consecutive interior angles or allied angles or co interior angles.
If a transversal intersects two Parallel Lines then each pair of interior angles on the same side of the transversal is supplementary.
If a transversal intersects two lines such that a pair of alternate interior angles is equal then the two lines are parallel.

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Knowledge Check

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    A
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