Dodecahedron is one of only five Platonic solids. This is a regular polyhedron with 20 vertices, 30 edges, and 12 faces. All faces are regular pentagons and at every vertex meet three faces and three edges.
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Drag the mouse to rotate the dodecahedron. Use the right button to remove and put back individual faces.
(Acknowledgement: I have learned most of Java details from the implementation by Meiko Rachimow.)
The word dodecahedron originates with the Greek duo (2) and deca (10). The other Platonic solids are tetrahedron, octahedron, icosahedron, cube. With 12 faces, 30 edges, and 20 vertices a dodecahedron confirms to the Euler's theorem:
Copyright © 1996-2017 Alexander Bogomolny