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प्रश्न
In the following figure, O is the centre of the circle. Find the value of a, b, c and d.
उत्तर
Here, ∠BAD = 90° (Angle in a semicircle)
∴ ∠BDA = 90° – 35° = 55°
Again, a = ∠ACB = ∠BDA = 55°
(Angle subtended by the same chord on the circle are equal)
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