# Perimeter and area

## Perimeter

The perimeter is the total distance all the way around the outside of a 2D shape.

The units for perimeter are:

• $$mm$$ (millimetre)
• $$cm$$ (centimetre)
• $$m$$ (metre)
• $$km$$ (kilometre)

### Example:

Perimeter = $$3cm$$ + $$4cm$$ + $$5cm$$ + $$2cm$$ + $$8cm$$ = $$22cm$$

## Area

The area of a 2D shape is the amount of surface it covers.

The units for area are:

• $$mm^{2}$$ (square millimetre)
• $$cm^{2}$$ (square centimetres)
• $$m^{2}$$ (square metre)
• $$km^{2}$$ (square kilometre)

### Example

Area = 24 squares

Area = $$24cm^{2}$$ (24 square centimetres)