From a point P outside a circle, PAB is secant and PT is a tangent to the circle, where A, B and T are points on the circle. If PT = 6 cm, PA = 5 cm and AB = x cm, then the value of x is?
Answer & explanation
Correct answer: option 4
PA × PB = PT2
5 (5 + x) = 36
25 + 5x = 36
x = \(\frac{11}{5}\) = 2.2 cm