The area occupied by a circle an be calculated in many different ways but the most straight forward way is to use the formula.

## Formula:

From the formula, all we need to find to calculate the area of a circle is the radius of the circle.

**Radius:** The distance from the center to the circumference of a circle

In an ideal situation, the radius will be given. But since it’s a straight line, it can also me measured.

Since Pi is always a constant, we only need to fill in the value of Pi (3.142) into the formula to calculate the are of the circle.

## Example:

Problem: Calculate the area of a circle with a radius of 6cm.

Solution:

## Some Facts About Area Of a Circle:

The unit of measurement used for the radius of the circle will be the same unit used for the area. i.e. If radius was in cm then area will be in cm squared.

Area of a circle can be calculated when you have either the radius, diameter or circumference of the circle.

The area of the circle can also be used to calculate radius using the formula for calculating the area of the circle.