| A | B |
|---|
| Polygon | A closed plane figure with at least 3 sides |
| Acute angle | Any angle that measures less then 90 degrees |
| Angle | Is made up of two ways with a common and point |
| Area | The number of squares contained inside of a polygon or a circle |
| Circle | The set of points in a plane that are all the same distance from the given point called the center |
| Circumference | The distance around a circle |
| Congruent Angles | Angles that have the same measurement are equal |
| Diameter | Segment that passes through the center of a circle and has both end points on the circle |
| Hexagon | 6 sided polygon |
| Obtuse Angle | An angle that measures greater then 90 degrees but less than 180 degrees |
| Octagon | 8 sided polygon |
| Parallel Lines | Lines in the same plane that do not intersect |
| Parallelogram | A quadrilateral with 2 pairs of opposite parallel |
| Pentagon | 5 sided polygon |
| Perimeter | Distance around a polygon |
| Pi | The special name for the ratio of the circumference to the diameter of a circle |
| Quadrilateral | Polygon with 4 sides |
| Radius | Any segment with one endpoint at the center and the other endpoint on the circle |
| Rectangle | A parallelogram with 4 right angles |
| Square | A polygon with all it's sides congruent and all it's angles congruent |
| Triangle | A polygon with 3 sides |
| Rhombus | A parallelogram with 4 congruent sides |
| Line | A straight angle of 180 degrees |
| Supplementary Angles | Two angles that add up to 180 degrees |
| Complementary Angles | Two angles that add up to 90 degrees |
| Acute Triangle | Triangle with les than 90 degree angles |
| Equilateral Triangle | Triangle with 3 equal sides |
| Isosceles Triangle | Triangle with two equal sides |
| Obstuse Triangle | A triangle that has an angle that measures greater than 90 degrees but less than 180 degrees |
| Point | Position in space |
| Right Angle | An angle with the measure of 90 degrees |
| Regular Polygon | A polygon with all it's sides and angles equal |
| Right Triangle | Triangle with one right angle |
| Scalene Triangle | A triangle with no equal sides. |
| Segment | Part of a line |
| Trapezoid | A quiadrilateral with exactly one pair of parallel sides |
| Vertical Angles | Two pairs of angles that are formed by intersecting lines |
