Question

In the given figure, tangent PT = 12.5 cm and PA = 10 cm; find AB.

Answer 1

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