Question
In the figure not drawn to scale, Y is the centre of the circle and BCE and ZCD are straight lines. If ∠DCE = 55° and ∠BCY is 4 times of ∠YCZ, find ∠ZAB.
4 m

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In the figure not drawn to scale, Y is the centre of the circle and BCE and ZCD are straight lines. If ∠DCE = 55° and ∠BCY is 4 times of ∠YCZ, find ∠ZAB.