# Octahedron

*Octahedron* is one of only five Platonic solids. This is a regular polyhedron with 6 vertices, 12 edges, and 8 faces. All faces are regular triangules and at every vertex meet four faces and four edges.

Drag the mouse to rotate the octahedron. Use the right button to remove and put back individual faces.

The word *octahedron* originates with the Greek *okto* (8). The other Platonic solids are tetrahedron, icosahedron, dodecahedron, cube. With 8 faces, 12 edges, and 6 vertices a dodecahedron confirms to the Euler's theorem:

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