| A | B |
| T-Square | a parallel-ruling straightedge |
| Transparent | allows light to pass through a material |
| Alphabet of Lines | the differetn lines or line symbols used on drawings |
| Horizontal | at right angles to the vertical; parallel to level ground |
| Vertical | being in a position or direction perpendicular to the plane of the horizon; upright |
| Inclined | deviating in direction from the horizontal or vertical; sloping |
| Parallel | lying in the same plane but never meeting no matter how far extended |
| Perpendicular | means at right angles (90°) to |
| Bevel | A surface slanted to another surface |
| Axis | An imaginary line around which something rotates |