Polyhedron are 3D shapes with flat faces and straight edges like cubes, dodecahedrons, and pyramids. Non polyhedron do not have flat faces or straight edges and include shapes like cones, cylinders, and spheres. The document defines and provides examples of polyhedron and non polyhedron shapes.

2. What are the polyhedron and non polyhedron?
non polyhedron:
Polyhedron:

3. Polyhedron: cube, dodecahedron, pyramid.
Non polyhedron: cone, cylinder, sphere.