2018 · Q92
In the figure given below, the radius of the circle is 6 cm and AT = 4 cm. The length of tangent PT is
Elementary MathematicsCircles
- A6 cm
- B8 cm
- C9 cm
- D10 cm
Explanation
By the power of a point (tangent-secant relation in the figure), PT^2 = AT x (AT + diameter) = 4 x (4 + 12) = 64. So PT = 8 cm. Hence option B.