When comparing or combining an area or volume it is important to measure the objects using the same units. Without converting the areas into the same unit, it might be difficult to tell, for example, ...

Since Cube 3 and Cube 4 have the same volume, \(1~\text{cm}^3 = 1,000 ~\text{mm}^3\) Here is a 10 cm cube. The volume of this cube is \(10~\text{cm} \times 10~\text{cm} \times 10~\text{cm} = ...