Question
In Fig. two parallel lines $l$ and $m$ are cut by two transversals $p$ and $q.$ Determine the values of $x$ and $y.$ 
✓
Answer
From the given figure, $x = 110^\circ [$Alternate interior angles$]$ And $y + 80^\circ = 180^\circ [\because$ sum of interior angles on the same side of transversal $180^\circ ]$
$\Rightarrow y = 180^\circ - 80^\circ $
$\Rightarrow y = 100^\circ $
$\Rightarrow y = 180^\circ - 80^\circ $
$\Rightarrow y = 100^\circ $
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