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In the figure, \(O\) is the centre of the circle and \(ABCD\) is a cyclic quadrilateral. If \(x\) \(=\) 22\(^{\circ}\) and \(y\) \(=\) 42\(^{\circ}\), find the unknown angle \(z\).
Answer:
The value of \(z\) is \(^{\circ}\).
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