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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? |
11 cm 10 cm 5.5 cm 2.2 cm |
2.2 cm |
PA × PB = PT2 5 (5 + x) = 36 25 + 5x = 36 x = \(\frac{11}{5}\) = 2.2 cm |
