There are two categories

- Plane Drawing - There are two dimensions on a plane

- Solid Drawing - These are three dimensional objects

 

Plane Drawing

Our world has three dimensions, but there are only two dimensions on a plane:

  • length and width make a plane
  • x and y also make a plane

And a plane goes on forever.

It's about flat shapes like lines, circles and triangles. Shapes that can be drawn on a piece of paper

 

Solid Drawing

Solid Drawing is about three dimensional objects like cubes,

prisms, cylinders and spheres.

There are two main types of solids, "Polyhedra", and "Non-Polyhedra":

Polyhedra: have flat surfaces

Non-Polyhedra: have one surface or more that is not flat