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# How to work out a circle's area

## What is the circle's area?

The area of a circle is the measurement of all the space within the circle's limits. For the easiest way of calculating the circle's area, you'll need to know the circle's radius.

## Working out the area from the radius

The mathematical formula is as follows:

**(pi)R^2**

If that means nothing to you however, here is the explanation:

Pi is the magic number used to help work out any circle's area. It is a never ending number, but for the purpose of this exercise we will take it to be of value: **3.142.**

So the formula above actually means the following:

**Multiply the value of the radius by itself (so if the radius is 5, it would be 5x5)****Multiply the result by Pi****The resulting number is the circle's area**

## Test the formula

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