| A | B |
| acute angle | An angle measuing more than 0 degrees and less than 90 degrees |
| congruent | Having the same size and shape |
| factor | Any number multiplied to form a product. A product can be divided by one factor to find the other factor. |
| equivalent | Having the same value |
| inverse | Reversed position or direction |
| vertex | The point of intersection for two sides of a plane figure, three sides of a solid figure, or the endpoints of two rays that form an angle. |
| common denominator | A number that is a multiple of all denominators in a problem. |
| polygon | Three or more line segments in a plane that forms a closed figure. The line segments never cross but meet at their endpoints. |
| product | The result of multiplying two or more numbers. |
| prime number | A number with only two factors: the number itself and one. |
| A number with only two factors: the number itself and one. | The difference between the least and greatest values in a set of numbers. |
| scalene triangle | A triangle with sides of different lengths and no two angles are the same. |
| area | Surface space that is measured in square units. |
| perimeter | The distance around a figure. |
| circumference | The distance around a circle (the perimeter of a circle). |
| angle | The figure formed when two rays meet at a common endpoint called a vertex. |
| common factor | A number that is a factor of two or more numbers. |
| complementary angles | Two angles whose sum equals 90 degrees. |
| diameter | A line segment that passes through the center of a circle and has its endpoints on the circle. It describes how wide the circle is. |
| greatest common factor (GCF) | The largest single factor for two or more numbers. |