In geometry, a polyhedron (plural polyhedra or polyhedrons) is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices. The word polyhedron comes from the Classical
Regular tetrahedron Platonic solid: Small stell
Rhombic triacontahedron Catalan solid: A toro
Icosidodecahedron Archimedean solid: Great
NON POLYHEDRON
Non-polyhedrons are cones, spheres, and cylinders because they have sides that are not polygons. A prism is a polyhedron with two congruent bases, in parallel planes, and the lateral sides are rectangles.
