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From a point P which is at a distance of 13 cm from the centre O of a circle of radius 5 cm, the pair of tangents PQ and PR to the circle are drawn. Then the area of the quadrilateral PQOR is
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A line through point of contact and passing through centre of circle is known as
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C (O, r¹) and C(O, r²) are two concentric circles with r¹ >r² AB is a chord of C(O, r¹) touching C(O, r²) at C then