Let O be the centre of a circle and P be the point outside the circle. If PAB is a secant to the circle intersecting the circle at A and B and PT is the tangent segment drawn from P, find the length of PT, if PA = 3 cm and AB = 9 cm.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 6 cm.
Calculations:
we know that, PT2 = PA × PB
⇒ PT2 = 3 × 12
⇒ PT2 = 36
⇒ PT = 6 cm