Great triakis icosahedron
Introduction 3D model of a great triakis icosahedronIn geometry, the '''great triakis icosahedron''' is a nonconvex isohedral polyhedron. It is the dual of the uniform great stellated truncated dodecahedron. Its faces are isosceles triangles. Part of each triangle lies within the solid, hence is invisible in solid models.
Proportions The triangles have one angle of  and two of . The dihedral angle equals .
See also * Triakis icosahedron
References *
External links *