Geometry 3D

The Octahedron

The Octahedron is a regular four-sided double pyramid. Its surface consists of eight equilateral triangles and is therefore one of the five Platonic solids.

The following elements of a Octahedron are calculated if one of them is given:

Example:

Given:
    Circumradius rc = 1

Results:     Edge a = 1,4142136
         Apothem h1 = 1,2247449
        Altitude h2 = 2
    Circumradius rc = 1
        Inradius ri = 0,57735027
           Volume V = 1,3333333
          Surface S = 6,9282032

See also:

Wikipedia: Platonic solid
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