Question

When the angle between the projectors and the plane of projection is not equal to 90 then the projection is?

Answer 1

Explanation:

Here the statement says that if the angle between the projectors and the plane of projection is not equal to 90 then the projection is Oblique.

Reason:

• Oblique projection is a parallel projection where the lines of sight are not perpendicular to the projection plane.
• Commonly inclined scales direct the guessing plane to a perpendicular to the connecting axis, while moving the sightlines to cross two additional sides of the object.
• The result is that the projection maintains the height and angles of the surface of the object associated with the aircraft.
• Oblique projections can be useful for curved objects if that surface is aligned with the indicator plane.
  

Answer 2

The parallel projection rays in an oblique projection are not perpendicular to the viewing plane, but rather strike it at an angle other than ninety degrees. Parallel lines in space appear parallel on the projected picture in both orthographic and oblique projection.