Which type of sketch uses equal angles of 120 degrees between axes?

The type of sketch that uses equal angles of 120 degrees between axes is the isometric sketch. In isometric sketches, the three principal axes are oriented at equal angles, specifically 120 degrees apart, which creates a foreshortened representation of all three dimensions (height, width, and depth). This allows for a more realistic, three-dimensional view of an object on a two-dimensional plane while maintaining proportionality, making it easier to visualize the object's dimensions.

Isometric sketches are commonly used in engineering and design because they provide a clear representation of how an object looks and can be easily interpreted by viewers. This characteristic distinguishes isometric sketches from other types, such as cabinet sketches, which typically depict one axis at a different angle (usually at 45 degrees) for a more distorted view. Pictorial sketches and oblique sketches have different characteristics regarding angles and perspectives, making them suitable for other specific representations rather than the equal 120-degree separation seen in isometric sketches.