9.) In Fig. 10.13, XY and X Y' are two parallel tangents to a circle w – InterviewSolution

1.	9.) In Fig. 10.13, XY and X Y' are two parallel tangents to a circle with centre O andanother tangentAB with point of contact C intersecting XY at A and X 'Y' at B. Provethat AOB = 90°.WI
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