Reflective symmetry (axis)
A polyomino has reflective symmetry over an axis if it can be flipped over a horizontal or vertical axis to return an identical polyomino. This type of symmetry is represented by , the cyclic group of order 2.
A polyomino has reflective symmetry over an axis if it can be flipped over a horizontal or vertical axis to return an identical polyomino. This type of symmetry is represented by , the cyclic group of order 2.