Ivars Peterson posted a lovely mosaic today ([url=http://mathtourist.blogspot.com/2016/11/star-of-lozenges.html]http://mathtourist.blogspot.com/2016/11/star-of-lozenges.html[/url]) and I was interested in the pattern and whether it generalized.[br][br]So often what you find is that the artist made an optimal choice. This exact triangle is the most interesting! What must its proportions be?[br][br]But try other symmetries (N). What are the interesting triangles for those?