# 5.MD.C.3

Recognize volume as an attribute of solid figures and understand concepts of volume measurement.

**a**
A cube with side length 1 unit, called a “unit cube,” is said to have “one cubic unit” of volume, and can be used to measure volume.

**b**
A solid figure which can be packed without gaps or overlaps using $n$ unit cubes is said to have a volume of $n$ cubic units.