**Solution:**

∠LRS+∠MLR = 180° (Pair of angles on the same side of a transversal is 180°. Hence, lines are parallel.)

⇒RS || LM ......(1)

Given PQ || RS ......(2)

From (1) and (2),

LM || PQ

Two parallel lines never intersect each other.

So, the measure of angles between two parallel lines is 180°.

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