select the correct answer. which planes are set up parallel to the inclined surface and perpendicular to any…

select the correct answer. which planes are set up parallel to the inclined surface and perpendicular to any one of the principal planes of projection? a. horizontal b. vertical c. auxiliary d. inclined
Answer
Brief Explanations:
Auxiliary planes are defined as planes set up parallel to an inclined surface and perpendicular to any one of the principal planes of projection. Horizontal planes are parallel to the horizontal principal - plane of projection, vertical planes are related to the vertical principal - planes, and inclined planes are not perpendicular to the principal planes in the described way.
Answer:
C. auxiliary