A surface represents the geometry associated with a physical part. A surface is a two-dimensional geometric entity that
may be used in automatic mesh generation.
Solids are closed volume of surfaces that can take any shape. Solids are three-dimensional entities that can be used in
automatic tetra and solid meshing.
Use the Midsurfaces tool to extract the midsurface of sheet metal stampings, molded plastic parts with ribs, and other parts that have
thickness clearly smaller than width and length.
Create and edit circles and rectangles with the Shapes tool.
Create and Edit Circles
Use the Circles tool to create circles for geometry construction, edit free circles, and create/toggle filled circles, for example, disk surfaces.
Create and Edit Rectangles
Use the Rectangles tool to create rectangles for geometry construction, edit free rectangles, and create/toggle filled rectangles.