Square tegum

{Infobox polytope The square bipyramid, also called a square dipyramid, is a bipyramid with a square as the equatorial section. Generally, a square bipyramid has 8 identical isosceles triangles as faces. The version with equilateral triangles is the regular octahedron, while other variatns can be constructed as duals of non-uniform square prisms.
 * type=Isotopic
 * dim = 3
 * faces = 8 isosceles triangles
 * edges = 4+8
 * vertices = 2+4
 * verf = 2 squares, 4 rhombi
 * coxeter = oxo4ooo&#yt
 * symmetry = BC2×A1, order 16
 * dual = Square prism
 * conjugate = Square bipyramid
 * conv=Yes
 * orientable=Yes
 * nat=Tame}}