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Platonic Solids
Regular Polyhedra

The solids which have faces that are all congruent regular polygons and which has dihedral angles that are all congruent.

There are only five possible shapes for a regular polyhedron: regular tetrahedron, cube, octahedron, dodecahedron, and icosahedron.

 

Tetrahedron Cube Octahedron Dodecahedron Icosahedron
Tetrahedron Image Cube Image Octahedron Image Dodecahedron Image Icosahedron Image
If your browser is Java-enabled, try dragging, shift dragging, control dragging, and right-click dragging both vertically and horizontally across these figures.

 


  this page updated 21-feb-16
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes