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Ex 10.5, 1 - In figure, A, B and C are three points on - Ex 10.5

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Ex 10.5, 1 In the given figure, A, B and C are three points on a circle with centre O such that BOC = 30 and AOB = 60 . If D is a point on the circle other than the arc ABC, find ADC. AOC = AOB + BOC = 60 + 30 = 90 Arc ABC subtends AOC at centre of circle. And ADC on point D AOC = 2 ADC 90 = 2 ADC 2 ADC = 90 ADC = 1/2 90 ADC = 45

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