How is volume commonly expressed in mathematical terms?

Volume is a measure of the space occupied by a three-dimensional object, and it is commonly expressed in cubic units. This is because volume encompasses three dimensions—length, width, and height—requiring measurements in three-dimensional space.

When we refer to cubic units, we mean units that are derived from measuring a cube. For example, if each side of a cube is 1 unit long, the cube's volume is 1 cubic unit. This three-dimensional aspect is key in distinguishing volume from other measurements.

In contrast, square units are used for measuring area, which considers only two dimensions (length and width). The concept of a surface area ratio does not pertain to volume directly, nor does linear measurement, which relates solely to one dimension (length). Thus, expressing volume in cubic units aligns with the geometric understanding of three-dimensional space.