Escherized Tessellation

What can you tell about this tessellation? What motions move one tile onto its neighbor? Rotation What is the underlying shape before it was modified? How do you know? 24-agon 24 sides

More GeoGebra at [url]mathhombre.blogspot.com[/url]. Base tessellation at [url]http://www.geogebratube.org/material/show/id/28859[/url]