Question

In the given figure a = 120 °,b = 60 ° ,Are the lines x and y parallel? Justify.​

Answer 1

The lines x & y are parallels because a & b are interior angles in the same side of the transversal and the sum of a & b =  180 (120+60=180).

Interior Angle Axiom:- 2 lines are said to be parallels if the sum of the interior angle in the same side of the transversal = 180.

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