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A,B and C are three points on a circle with centre O such that angle BOC=30° and angle AOB=60° . If D is a point on the circle other than the arc ABC, find

angle ADC


Refer to ncert text book,u will see that theorem 10.8 governs the problem.
here it is given that angle BOC=30 and AOB=60
therefor,angle AOC=60+30=90
Now, acc. to theorem 10.8-
angle ADC=1/2AOC
Hope it helps........ : )

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