The number of square units that cover a flat figure without gaps or overlaps.

The volume of a cube whose sides are each 1 unit long.

Example: A cube whose sides are each 1 inch long has a volume of 1 cubic inch.

A solid figure with 6 faces that are all rectangles.

A cube whose sides are each 1 unit long. Unit cubes are used to measure volume.

The number of unit cubes that fill a solid figure without gaps or overlap.