# Area of Circle Formula

The area of a circle is given by the number π (pi) multiplied by the radius of the circle squared.

## Examples

### Area of Circle given Radius of One

To calculate the area of a circle given a radius of one, set up the equation for the area of the circle and substitute the value of the radius into the equation.

### Area of Circle given Radius of Two

To calculate the area of a circle given a radius of two, set up the equation for the area of the circle and substitute the value of the radius into the equation.

### Area of Circle given Radius of Three

To calculate the area of a circle given a radius of three, set up the equation for the area of the circle and substitute the value of the radius into the equation.