In what ways can area be communicated?

Students estimate and calculate area using standard units.

Area is expressed in the following standard units, derived from standard units of length:

• square centimetres

• square metres

• square kilometres

A square centimetre (cm2) is an area equivalent to the area of a square measuring 1 centimetre by 1 centimetre.

A square metre (m2) is an area equivalent to the area of a square measuring 1 metre by 1 metre.

A square kilometre (km2) is an area equivalent to the area of a square measuring 1 kilometre by 1 kilometre.

Among all rectangles with the same area, the square has the least perimeter.

Area can be expressed in various units according to context and desired precision.

Rectangles with the same area can have different perimeters.