Find the radius of a circle using these simple instructions.

The **radius** of a circle is the distance from the center point to any point on the circle's perimeter. You use the term * radii* when referring to more than one radius. If you decided to draw two radii at opposite sides, then you would have made a line traverse the entire circle like the example illustrates.

If you know the diameter of the circle then you simply divide the diameter by 2 in order to get the radius.

See also: Find diameter and circumference of a circle | Formula for finding the area of a rectangle | What is a circle? | What is the radius of a circle? | What is the diameter of a circle? | What is the circumference of a circle?