In which projection is one face seen squarely in true size and shape?

In the context of different projection methods used in drafting and design, oblique projection is characterized by having one face of the object displayed in true size and shape, while the other dimensions are represented at an angle. This means that when looking at an object using oblique projection, you are seeing one face head-on, allowing for a clear view of its proportions and features. The face is not distorted, providing a more accurate representation of that particular side of the object.

This technique is particularly useful for technical illustrations where clarity of the primary feature is desired while remaining conscious of the overall form. Other projection types, such as isometric, perspective, and axonometric, do not fulfill this requirement as they do not present one surface in a direct frontal view. In isometric projections, all dimensions are equally foreshortened, leading to a lack of true size representation for any individual face. Perspective projection introduces a viewpoint that can distort size and shape based on the observer's position, while axonometric projections maintain some dimensional relationships but do not showcase one face in true size and shape either.