| Term | Definition |
| Edge | The line segment where two faces of a solid figure meet. |
| Equation | A statement that two mathematical expressions are equal. |
| Equivalent | Having the same value. |
| Expression | A variable, or any combination of numbers, variable, and symbols that represents a mathematical relationship. |
| Face | A plane figure that serves as one side of a solid figure. |
| Fact Family | A set of related addition and subtraction, or multiplication and division equations using the same numbers. |
| Factor | A whole number that divides evenly into another whole. |
| Function | A relation in which every input value has a unique output value. |
| Hexagon | A polygon with 6 sides. |
| Inequality | A mathematical sentence that contains a symbol that shows the terms on either side of the symbol are unequal. |
| Vertex | A point where lines, rays, sides of s polygon meet (corner). |