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Triakis octahedron

In geometry, a triakis octahedron is an Archimedean dual solid, or a Catalan solid. Its dual is the truncated cube.

Cartesian coordinates
Let , then the 14 points and , and are the vertices of a triakis octahedron centered at the origin. The length of the long edges equals , and that of the short edges . The faces are isosceles triangles with one obtuse and two acute angles. The obtuse angle equals ≈ ° and the acute ones equal ≈ °. ==Orthogonal projections==
Orthogonal projections
The triakis octahedron has three symmetry positions, two located on vertices, and one mid-edge: ==Cultural references==
Cultural references
• A triakis octahedron is a vital element in the plot of cult author Hugh Cook's novel The Wishstone and the Wonderworkers. == Related polyhedra ==
Related polyhedra
The triakis octahedron is one of a family of duals to the uniform polyhedra related to the cube and regular octahedron. The triakis octahedron is a part of a sequence of polyhedra and tilings, extending into the hyperbolic plane. These face-transitive figures have (*n32) reflectional symmetry. The triakis octahedron is also a part of a sequence of polyhedra and tilings, extending into the hyperbolic plane. These face-transitive figures have (*n42) reflectional symmetry. ==References==
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