All of the known pentagons that tile the plane (can be repeated over and over again to fill up a flat space), including the very exciting newest one!
Find out more here: http://www.theguardian.com/science/alexs-adventures-in-numberland/2015/aug/10/attack-on-the-pentagon-results-in-discovery-of-new-mathematical-tile?CMP=soc_567













