how can example 2 be right because 110+50 =160 and the alternate interior angles are not equal
rn
See, we are not at all taking 1100 into consideration. We are taking AB to be transversal for PQ and RS. In that case, L UXY + L XYV = 180[ since 130 +50 = 180] Using the converse of the theorem "Co-interior angles are supplimentary", we can say that PQ and RS are parallel with transversal AB
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