In the figure O is the centre of the circle and OABC is a parallelogram. Find angle ABC and angle OAB.
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Step-by-step explanation:
In the given figure, O is the centre of the circle and OABC is a parallelogram. What is the value of angle AOC =?
If the other three points lie on the circle, angle AOC = 120°
If they do not lie on the circle then it is not possible to determine angle AOC.
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