Galvagni Figures & Reid Figures for Heptiamonds

A heptiamond is a figure made of seven equilateral triangles joined edge to edge. A Galvagni figure is a figure that can be tiled by a polyform in more than one way—a kind of self-compatibility figure. A Reid figure is a Galvagni figure without holes.

All of the heptiamond Galvagni figures and most of the Reid figures were found by Dr. Michael Reid of the University of Central Florida. Here are the known minimal Galvagni figures for heptiamonds:

And here are the minimal known Reid figures:

Back to Polyform Curiosities.

Col. G. L. Sicherman [ HOME | MAIL ]