A tetraming is a plane figure formed by joining four
cells in the equilateral triangular grid along edges or at corners or both.
There are 75 tetramings, independent of reflection.
is a figure with binary symmetry formed by an odd number of copies of
Here are the minimal known tetraming oddities with various symmetries.
Please write if you find a smaller solution or solve an unsolved case.
Horizontal Mirror Symmetry
Vertical Mirror Symmetry
2-Rotary Symmetry On Vertex
2-Rotary Symmetry On Edge
Horizontal and Vertical Symmetry On Vertex
Horizontal and Vertical Symmetry On Edge
Last revised 2021-01-03.
Back to Polyform Oddities
Col. George Sicherman