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In the given figure, PQ || RS, TR || QU and ∠PTR = 42°. Find ∠QUR. - Mathematics

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Question

In the given figure, PQ || RS, TR || QU and ∠PTR = 42°. Find ∠QUR.

Sum

Solution

Since, PQ || RS and TR is a transversal.

∴ ∠PTR – ∠TRU = 42°  ......(i) [Alternate interior angles]

Also, TR || QU and RS is a transversal.

∴ ∠TRU + ∠QUR = 180°  ......[Co-interior angles]

⇒ 42° + ∠QUR = 180°   ......[Using (i)]

⇒ ∠QUR = 180° – 42° = 138°

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Chapter 5: Lines and Angles - Exercise [Page 140]

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NCERT Exemplar Mathematics [English] Class 7
Chapter 5 Lines and Angles
Exercise | Q 75. | Page 140

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