in the given figure , o is the centre of the circle a circle . then angle obc is ....
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OA=OB (radius)
equal sides makes equal angles
angle A = angle B
A +B +C = 180⁰
B+B+50⁰ = 180⁰
2B = 180⁰-50⁰
2B = 130⁰
B = 65⁰
OBA = 65⁰
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