In the given figure, AB ia a ______ to the circle.
Secant
tangent
arc
radius
A tangent is a line that touches the circle at one point.
Hence, AB is a tangent to the circle.
In the figure given below, PAB is a secant and PR is a tangent to the circle. If PA : AB = 1 : 8, and PR = 15 cm, find the length of PB.