Geometry Practice Test 7

∠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°.