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C_(1) and C_(2) are two concentric circles with centres at O. Their radii are 12 cm and 3 cm respectively. B and C are the points of contact of two tangents draw to C_(2) from a point A lying on the circle C_(1). Then the area of the quadrilateral ABOC is- |
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Answer» `(9 SQRT(15))/(2) cm^(2)` |
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