## Radius

### The radius is a measurement that is used to describe the size of a circle

The radius is a measurement that is used to describe the size of a circle. It is the distance from the center of the circle to any point on its circumference.

To find the radius of a circle, you need to know either the diameter or the circumference. The radius is always half of the diameter.

If you know the diameter, you can simply divide it by 2 to find the radius.

For example, if the diameter of a circle is 10 units, the radius would be 10/2 = 5 units.

If you know the circumference, you can use the formula:

Circumference = 2πr

Where C is the circumference, π (pi) is a mathematical constant approximately equal to 3.14159, and r is the radius.

Rearranging the formula, you can solve for the radius:

r = C / (2π)

For example, if the circumference of a circle is 20 units, the radius would be 20 / (2 * 3.14159) ≈ 3.183 units.

The radius determines the size of a circle and is used in several mathematical formulas involving circles, such as finding the area or circumference.

## More Answers:

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