| A | B |
|---|
| Ordered Pair | A pair of numbers in a specific order used to locate points in the coordinate plane. |
| Collinear | Points that lie on the same line. |
| Coplanar | Points that lie in the same plane |
| Undefined terms | Point, Line, Plane |
| Space | A boundless, 3-dimensional set of all points. |
| Perimeter | Distance around a polygon. |
| Congruent | Two segments or angles that have the same measures |
| Theorem | A statement that must be proven true. |
| Postulates, Definitions, Undefined Terms | Statements that are accepted as true. |
| Angle | Figure formed by two noncollinear rays with a common endpoint |
| Ray | Extends indefinitely in one direction |
| Degrees | Angles are measured in these units. |
| Right Angle | An angle whose measure is equal to 90 degrees. |
| Obtuse Angle | An angle whose measure is more than 90 degrees. |
| Acute Angle | An angle whose measure is less than 90 degrees. |
| Perpendicular Lines | Intersect to form a right angle. |
| Complementary Angles | 2 angles whose sum is 90 degrees. |
| Supplementary Angles | Angles whose sum is 180 degrees. |
| Adjacent Angles | Angles that have a common vertex, common side, but no common interior points |
| Vertical Angles | 2 nonadjacent angles formed by 2 intersecting lines |
| Linear Pair | Adjacent angles whose noncommon sides are opposite rays |
| Opposite Rays | 2 rays that form a line |
| Angle Bisector | Divides an angle into 2 congruent parts |
| Proof | A logical argument in which each statement you make is backed up by a statement that is accepted as true. |
