| A | B |
|---|
| Parallel lines | lines that do not intersect |
| Oblique lines | lines that are neither horizontal nor vertical |
| Perpendicular lines | 2 lines that intesect at right angles |
| Acute angle | An angle that is more than 0 degrees and less than 90 degrees |
| Obtuse angle | An angle that is more than 90 degrees but less than 180 degrees |
| Right angle | An angle that measures 90 degrees |
| Vertex | A point where two lines meet |
| Intersect | Lines that cross |
