I drew this freehand for World Tessellation Day the First, and had to make it in GeoGebra afterward. It's based on a single right angled kite, so C is the only real parameter here.[br][br]Find out more about WTD at [url=https://www.facebook.com/WorldTessellationDay/]https://www.facebook.com/WorldTessellationDay/[/url]