| A | B |
|---|
| Point | Location in space named with a letter |
| Line Segment | Straight path between 2 points called its endpoints |
| Ray | Straight path that goes on forever in one direction from an endpoint |
| Parallel Lines | Lines that never cross or meet and are the same distance apart everywhere |
| Line | Straight path that goes on forever in both directions |
| Intersecting Line Segments | Line segments that cross or meet |
| Perpendicular Lines | Lines that intersect to form right angles |
| Right Angle | Angle that measures 90 degrees |
| Acute Angle | Angle that measures less than 90 degrees |
| Obtuse Angle | Angle that measures more than 90 degrees and less than 180 degrees |
| Vertex | Endpoint where rays or segments meet |
| Right Triangle | 3-sided shape with one right angle |
