In the given figure, line I intersects two parallel lines PQ and RS. Then, which one of the following is not true? (a) 21 + 25 = 180° (b) 22 + 25 = 180° (c) 23 + 28 = 180° (d) 22 + 23 = 180°
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Given, PQ parallel to RS and line l is a transversal.
∴∠2=∠4 [ Corresponding angles ]
∠1=∠3 [ Corresponding angles ]
∠6=∠7 [ Alternate exterior angles ]
but ∠4
=∠8[supplementary angles]
So, option D is correct.
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