Question
In the figure, not drawn to scale, ZB, AC and OA are straight lines. Given that O is the centre of the circle and ∠OZC = 30°, find ∠OBC.
3 m

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In the figure, not drawn to scale, ZB, AC and OA are straight lines. Given that O is the centre of the circle and ∠OZC = 30°, find ∠OBC.