Triangular antiprismatic symmetry

Triangular antiprismatic symmetry, also known as trappic symmetry and notated (G2×A1)/2, is a 3D spherical symmetry group. It is the symmetry group of the triangular antiprism and is a subgroup of octahedral and icosahedral symmetry.

Subgroups

 * (G2+×A1)/2 (maximal)
 * (A2×A1)+ (maximal)
 * A2×I (maximal)
 * A2+×I
 * K2+×A1 (maximal)
 * K2+×I
 * ±(I×I×I)
 * A1×I×I
 * I×I×I

Convex polytopes with (G2×A1)/2 symmetry

 * Triangular antiprism (isogonal)/Triangular antitegum (isotopic)
 * Ditrigonal trapezoprism (isogonal)/Trigonal scalenohedron (isotopic)