1.

In the figure, point Q is the point of contact. If PQ = 12, PR = 8 then find PS. 

Answer»

In figure, PQ = 12, PR = 8

PQ2 = PR × PS .......(Tangent secant theorem)

∴ 122 = 8 × PS 

∴ 144 = 8 × PS 

∴ PS = 144 / 8 

∴ PS = 18



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