| A | B |
|---|
| Absolute value | A number's distance from zero (0) on a number line. The absolute value of both 4, written |4|, and negative 4, written |-4|, equals 4. |
| Acute Angle | An angle with a measure of less than 90 degrees. |
| Algebraic equation | A mathematical sequence in which two expressions are connected by an equality symbol. |
| Circumference | The perimeter of a circle is called its circumference. |
| Algebraic order of operations | An expression containing numbers and variables (e.g., 7x), and operations that involve numbers and variables (e.g., 2x + y or 3a - 4). Algebraic expressions do not contain equality or inequality symbols. |
| Angle | The shape made by two rays extending from a common end point, the vertex. Measures of angles are described using the degree system. |
| Area | The inside region of a two-dimensional figure measured in square units (e.g., a rectangle with sides of 4 units by 6 units contains 24 square units or has an area 24 square units). |
| Complementary angles | Two angles, the sum of which is exactly 90 degrees. |
| Diameter | A line segment from any point on the circle passing through the center to another point on the circle. |
| Inverse operation | An action that cancels a previously applied action. For example, subtraction is the inverse operation of addition. |
