Reflection symmetry (3D)

Three-dimensional reflection symmetry, also known as dyadic symmetry or bilateral symmetry and notated as A1×I×I, is a 3D spherical symmetry group. It is the symmetry group of the sphenoid and corresponds to mirror symmetry. It is a subsymmetry of all regular polyhedral subsymmetries.

Subgroups

 * I×I×I (maximal)