Q96 of 113 Page 128

If a transversal intersects two parallel lines, and the difference of two interior angles on the same side of a transversal is 20°, find the angles.

Let one angle be x and the other angle be x + 200


Sum of two interior angles on the same side of a transversal = 1800


x + x + 200 = 1800


⇒ 2x = 1600


⇒ x = 800


The two angles are 800 and 1000


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