# GCSE Mathematics/Area and Volume

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## Area of a square[edit | edit source]

To work out the area of a square, take one side, and multiply it by itself, as all sides on a square are equal.

## Area of a rectangle[edit | edit source]

To work out the area of a rectangle, multiply one of one of the sets of parallel sides, by one of the other set of parallel sides.

## Area of a circle[edit | edit source]

To work out the area of a circle, use the formula

.

In the equation, r, the radius is the line from the circumference of a circle (the outside) to the center point.