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Question
In the given figure, tangent PT = 12.5 cm and PA = 10 cm; find AB.
Solution
Since PAB is the secant and PT is the tangent
∴ PT2 = PA × PB
`=>` 12.52 = 10 × PB
`=>` PB = `(12.5 xx 12.5)/10` = 15.625 cm
AB = PB – PA
= 15.625 – 10
= 5.625 cm
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