Two circles with same centre P have radii 7.5 cm and 4.4cm. Though a point A of the larger circle , a tangent is drawn to the smaller circle touching it at B. Find AC (approximate)?
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use pythagorus
ab=bc
ab^2+4.4^2=7.5^2
ab^2=36.89
ab=6.07
ac=6.07*2=12.14
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