Multiview/Orthograpic Sketches: Views of an object projected onto two or more orthographic planes.
Oblique: A type of sketch involving a combination of a flat, orthographic front with depth lines receding at a selected angle, usually 45 degrees
Isometric: A form of pictorial sketch in which all three drawing axes form equal angles of 120 degrees with the plane of projection.
Perspective: The creation of a figure through vanishing points.
The following pictures show examples of all three.
| Multiview/Orthographic |
| Oblique Pictorials |
| Isometric |
| Isometric |
| One, Two and Three Point Perspective Sketches |