Hendecagonal symmetry

Hendecagonal symmetry, notated as I2(11), is a 2D spherical Coxeter group. It is the symmetry group of the hendecagon, with 11 rotation and 11 reflection elements.

Subgroups

 * I2(11)+ (maximal)
 * A1×I (maximal)
 * I×I

Convex polytopes with I2(11) symmetry

 * Hendecagon (regular)
 * Dihendecagon (isogonal)/Hendecambus (isotopic)