Line CB touches circle A only at one point (point B), hence CB is a tangent.
What is a circle?
A circle is the locus of a point such that its distance from a fixed point (center) is always constant.
When a line intersects a circle in exactly one point the line is said to be tangent to the circle
Hence since Line CB touches circle A only at one point (point B), hence CB is a tangent.
Find out more on circle at: https://brainly.com/question/24375372
