Which drawing technique includes angles of 120 degrees between axes?

The correct choice is isometric drawing, which is characterized by a unique method of representation where the three principal axes are equally inclined to the viewing plane, creating angles of 120 degrees between them. This technique is particularly useful in technical and engineering drawings because it allows for a clear depiction of an object while maintaining proportional relationships in all three dimensions. Isometric drawings effectively convey an object's shape and volume, making them an essential tool for visualizing complex geometric forms.

In contrast, orthographic projection uses perpendicular projections to represent different views of an object—typically top, front, and side views—without representing depth in the same manner. Perspective drawing focuses on creating a realistic view of an object in space, using vanishing points to establish dimensionality, leading to angles that can vary significantly. Oblique drawing, another method of representing three dimensions on a two-dimensional surface, typically uses a 45-degree angle for the depth axis instead of the 120-degree angles found in isometric drawings.