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The sum of complimentary angles is __________(a) > 90°(b) < 90°(c) = 90°(d) = 180°I have been asked this question in an international level competition.My enquiry is from Lines and Angles Definitions and Basic Terms topic in section Lines and Angles of Mathematics – Class 9

Answer»

Right OPTION is (c) = 90°

The EXPLANATION: When the sum of two angles are equal to 90°, they are called COMPLIMENTARY angles. In the diagram SHOWN below, ∠POR and ∠ROQ are complimentary angles because ∠POR + ∠ROQ = 90°.



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