Auxiliary projections

Auxiliary projections help you draw 3D objects that are tilted or at angles that aren't straight on. When you can't see the true shape of an object in standard front and side views, you create an auxiliary view by imagining a new vertical plane positioned at the angle of the slanted surface. Think of it like standing sideways to get a better look at something tilted.

For solid shapes like prisms, cones, cylinders, pyramids and cubes, auxiliary projections show their true sizes and shapes when they're rotated. Imagine a pyramid standing at an angle on your desk—the front view looks distorted, but if you draw an auxiliary view perpendicular to its slanted face, you see the real triangular shape clearly.

Second auxiliary projections go further, creating a third view from the first auxiliary view. This is useful for complex angles. Picture a wedge-shaped box tilted diagonally—you might need two auxiliary views to fully understand its geometry.