Question 2 In figure, if ∠AOB=125∘. Then ∠ COD is equal to (A) 62.5° (B) 45° (C) 35° (D) 55°
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Solution
We know that, the opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centre of the circle i.e∠AOB+∠COD=180∘∠COD=180∘−∠AOB=180∘−125∘=55∘