| A | B |
|---|
| Point | Undefined Term represented by a dot |
| Line | Undefined Term represented by a line with 2 arrows without end |
| Plane | Undefined Term represented by 3 points not on the same line |
| Collinear Points | Points on the Same Line |
| Coplanar Points | Points on the Same Plane |
| Line Segment | Consists of endpoints and all points between |
| Ray | Consists of one endpoint and all points in one direction from endpoint |
| Opposite Rays | 2 rays going opposite direction that when put together form the whole line |
| Intersection | figures that have 1 or more points in common |
| Postulate | A rule accepted without proof |
| Theorem | A rule that can be proven to be true |
| Distance | How far apart 2 things are |
| Congruent Segments | Line segments that have the same length |
| Midpoint | A point that divides a segment into 2 segments with the same length |
| Segment Bisector | A point |
| Angle | The space between 2 rays that share a common endpoint |
| Vertex | The endpoint of an angle |
| Measure of an Angle | The degrees between the two rays of an angle |
| Acute Angle | An angle less than 90 degrees |
| Right Angle | An angle exactly 90 degrees |
| Obtuse Angle | An angle greater than 90 degrees |
| Straight Angle | An angle equal 180 degrees |
| Congruent | 2 angles that have the same measure (or number of degrees) |
| Angle Bisector | A ray which divides an angle into 2arts which have the same measure |
| Complementary Angles | 2 angles that add to 90 degrees |
| Supplementary Angles | 2 angles that add to 180 degrees |
| Adjacent Angles | 2 angles that share a common ray |
| Linear Pair | 2 adjacent angles that are supplementary |
| Vertical Angles | 2 angles that are across from one another created by intersecting lines |
