Octahedron Day - March 8

Today is a day to celebrate the least-sided of the platonic solids, the regular octahedron.

A regular octahedron is formed by putting 8 identical equilateral triangles together into a convex polyhedron. It will have 6 vertices, 8 faces, and 12 edges. (A non-regular octahedron would can consist of any polyhedron with 8 faces, and could have as many as 12 vertices and 18 edges.)

The regular octahedron is also a square bipyramid where all the faces are equilateral triangles. A bipyramid is a polyhedron with a polygon as a base where each vertex connects to another point on a different plane as the base, and does the exact same thing on the other side of the base. 

We celebrate octahedrons on March (3rd month) 8 because it's composed of 8 triangles (3-sided polygons).

The original uploader was Cyp at English Wikipedia.Later versions were uploaded by Fropuff at en.wikipedia., CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons


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