This is an MCQ-based quiz for GRE on **The Radius Of A Circle.**

The radius of a circle is the distance from the circle's center to any point on its circumference. It is usually denoted by 'R' or 'r'.

What is the circumference of a circle with an area of 36π?

What is the area of a circle, one-quarter of the circumference of which is 5.5 inches?

Which point could lie on the circle with radius 5 and center (1,2)?