The length of the tangent drawn from a point, whose distance from the centre of a circle is 5 cm and the radius of the circle is 3 cm. is
4
6
3
5
OP2 = OT2 + PT2 [By Pythagoras Theorem]
52 = 32 + PT2
PT2 = 52 – 32 = 25 - 9 = 16
PT = 4
Length of tangent = 4 cm