Diagram NOT accurately drawn $$\(A, B, C\)$$ and $$\(D\)$$ are points on a circle, centre $$\(O\)$$ $$\(A O C\)$$ is a diameter of the circle. Angle $$\(B A C=55^{\circ}\)$$ Work out the size of angle $$\(A D B\)$$ Give a reason for each stage of your working.

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