Hint. PB = 10 cm (check), AAPB - ACQB.
Two circles with centres A, B are of radii 6 cm and 3 cm respectively. If AB = 15 cm,
find the length of a transverse common tangent to these circles.
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the formula of transverse common tangent is (d²- (r1+ r2)²)½
length of trnvrs common tangent is 12cm
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