| A | B |
| Chord | A line segment whose endpoints are on a circle |
| Circumference | The distance around a circle |
| Composite Number | A whole number having more than two factors |
| Diameter | A line segment that has endpoints on a circle and passes through the CENTER of the circle |
| Expanded Notation | A way to write numbers that shows the value of each digit |
| Greatest Common Factor | The largest factor that 2 or more numbers have in common |
| Heptagon | A polygon with 7 sides |
| Histogram | A bar graph in which the labels for the bars are numerical intervals |
| Hypotenuse | The longest side of a right triangle, which is also the side opposite the right angle |
| Least Common Denominator | The least common multiple of the denominators in two or more fractions |
| Least Common Multiple | The smallest number, other than zero, that is a common multiple of two or more numbers |
| Leg (of a right triangle) | Either of the two sides that form the right angle in a right triagle |
| Line Plot | A graph showing the frequency of data on a number line |
| Nonagon | A polygon with 9 sides |
| Plane | A flat surface that extends infinitely in all directions |
| Prime Number | A whole number that has exactly 2 factors, 1 and itself |
| Quadrants | The four regions of a coordinate plane that are separated by the axes |
| Radius | A line segment that has one endpoint on a circle and the other endpoint at the center of the circle |
| Range | The difference between the greatest and least numbers in a set of data |
| Rate | A ratio that compares two quantities having different units |
| Ratio | A comparison of two numbers using division |
| Regular Polygon | A polygon that has all sides congruent and all angles congruent |
| Repeating Decimal | A decimal that has a repeating sequence of numbers after the decimal point |
| Similar Polygons | Polygons that have the same shape, but are not necessarily the same size. Corresponding sides of similar polygons are proportional |
| Straight Angle | An angle with a measure of 180 degrees |
| Terminating Decimal | A decimal that contains a finite number of digits |
| Transformation | The moving of a figure by translation (slide), rotation (turn), or reflection (flip) |
| Unit Price | The price of a single item or amount |
| Unit Rate | A rate with the second term being one unit |
| Venn Diagram | A diagram that shows relationships amoung sets of objects |
| X-Axis | The horizontal number line on a coordinate grid |
| Y-Axis | The vertical number line on a coordinate grid |