| A | B |
| CIRCUMFERENCE | The distance around a closed curve. A type of perimeter. |
| DIAMETER | A chord that passes through the center of a circle. |
| RADIUS | The segment joining the center of a circle to a point on the circle. |
| SUPPLEMENTARY ANGLES | Two angles that add up to 180⁰. |
| TANGENT | A line that intersects a circle at exactly one point. |
| ARC | A figure consisting of two points on a circle and all the points on the circle needed to connect them by a single path. |
| CENTRAL ANGLE | An angle whose vertex is at the center of a circle. |
| COMPLEMENTARY ANGLES | Two angles that add up to 90⁰. |
| SIMILAR FIGURES | Figures that are the same shape, Corresponding angles are congruent and corresponding sides are proportional. |
| PARALLELOGRAM | Quadrilateral who two pairs of parallel sides |
| REGULAR POLYGON | All sides of the polygon are congruent to each other. |
| ISOSCLELES TRAPEZOID | Polygon with one set of parallel sides and one pair of congruent sides. |
| INTERQUARTILE RANGE | The difference between the upper and lower quartile. |
| MODE | The number that appears the most in a set of data. |
| RANGE | The difference between the minimum and maximum # in a set of data. |
| COEFFICIENT | The number in front of a variable. |
| PYTHAGOREAN THEREOM | Is used to find the length of the third side of a RIGHT triangle |
| ACUTE ANGLE | An angle whose measure is between 0 and 90. |
| HEPTAGON | A polygon with seven sides. |
| PENTAGON | A polygon with five sides. |
| MINOR ARC | An arc of a circle that is less than 180 degrees. |
| MAJOR | An arc of a circle that is greater than 180 degrees. |
| ISOSCELES TRIANGLE | A triangle that has two congruent sides. |
| KITE | Quadrilateral with two pairs of congruent adjacent sides and not opposite sides congruent. |
| OBTUSE ANGLE | An angle whose measure is between 90 and 180. |
| PERPENDICULAR LINES | Lines that intersect and form right angles. |
| QUADRILATERAL | A polygon with four sides. |
| RHOMBUS | A parallelogram with four congruent sides. |
| RECTANGLE | A parallelogram with four 90 degree angles. |
| HYPOTENUSE | The side opposite the right angle in a right triangle. |
| SCALENE TRIANGLE | A triangle with no congruent sides. |
| VERTICAL ANGLES | Two angles whose sides form two pairs of opposite rays and are congruent. |