Decagonal symmetry

Decagonal symmetry, also known as deggic symmetry and notated as I2(10), is a 2D spherical Coxeter group. It is the symmetry group of the decagon, with 10 rotation and 10 reflection elements.

Subgroups

 * I2(10)+ (maximal)
 * H2 (maximal)
 * H2+
 * K2 (maximal)
 * K2+
 * A1×I
 * I×I

Convex polytopes with G2 symmetry

 * Decagon (regular)
 * Didecagon (isogonal)/Decambus (isotopic)