## Glossary

**area**

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

**axes**

The numbered lines on a grid.

**coordinate grid**

A grid containing the horizontal and vertical axes.

**coordinates**

A pair of numbers that shows an exact position on a grid. The first number represents a position on the horizontal axis and the second number represents a position on the vertical axis.

**cubic unit**

A unit cube with side lengths that are standard measurement units that is used to measure volume.

**horizontal axis**

The number line that runs from left to right in a pair of axes.

**power of 10**

The result of multiplying 10 by itself a given number of times.

**rectangular prism**

A solid figure which has six faces that are rectangles.

**right triangle**

A triangle with a 90 degree angle.

**unit cube**

A cube whose sides are 1 unit long, used to measure volume.

**vertical axis**

The number line that runs up and down in a pair of axes.

**volume**

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