The five regular polyhedrons, meaning that they are polyhedrons that have faces which are congruent regular polygons and have the same number of edges meeting at each vertex.
George Hart's Platonic Solids Page
: See more examples of the Platonic Solids.
Solids at ScienceU.com
: Read about special types of solids - the Platonics Solids and the Archimedian Solids.
Classroom Polyhedra Activities at GeorgeHart.com
: Ideas to help incorporate the study of polyhedra into the classroom.
George Hart's Platonic Relationship Page
: Read about examples of the Platonic Relationships.