Answer:
Forms are art elements that are three-dimensional, with height, width, and depth. Form, together with shape are areas or masses which define objects in space. Forms in art are used by artists to produce an illusion of 3D and depth on a two-dimensional surface.nation.
I think it is true I mean it been a while
Picture plane is in perspective, the imaginary plane corresponding to the surface of a picture, perpendicular to the viewer's line of sight.
I believe it was in the 1930's.
