Which measurement unit is used to express area?

Area is a measure of the amount of space inside a two-dimensional shape. To express area, we use square units. This is because area is calculated by multiplying two linear measurements (length and width), which inherently relates to squaring those linear units. For example, if a rectangle has a length of 5 meters and a width of 3 meters, its area would be calculated as 5 meters multiplied by 3 meters, resulting in 15 square meters (m²).

This distinction is important as linear units (like meters or feet) are used for measuring length, while cubic units (like cubic meters or cubic inches) are used for volume, which involves three dimensions. Decimal units refer to a method of presenting numerical values, not specifically tied to area measurement. Thus, square units are the appropriate and correct choice for expressing area.