4 Teaching about area and volume

Area is a measurement of the amount of space inside a 2D shape and is reckoned by the number of unit squares inside the shape. Common metric units of area are square centimetres (cm²), square metres (m²) or hectares (ha) for measuring land areas. A hectare is defined as 100 m × 100 m or 10 000 m². Imperial measures of area are square inches, square feet and acres for measuring land areas.