World Tessellation Day 2019

4th annual World Tessellation Day. Begun in 2016 by Emily Grosvenor for M. C. Escher's birthday. (More of that story and Emily's book.) Don't think I'll get a chance to make a new tessellation for today, but here are some of my favorites from the past year. (Mine followed by the real treats from others.)

Mine:

In Isometric

GeoGebra applet

GeoGebra applet

GeoGebra applet

GeoGebra applet

Others':

• David Petro's double translation tessellation in Desmos
• Regolo double rotation elephants.
• Marcelo Henrique Tatuador's cool graphic 2 tile.

• Diego Lieban's sweet animation of a classic square alteration. 
• Hidekazu Nomura is a great twitter author of many figurative and geometric tessellations. Like these kites.
• Jason Panda's awesome Batman.
• Must visit: Craig Kaplan's Tactile applet

• Gábor Damásdi's fascinating quadrilateral. (Made me make this applet.)
• Tim Lexen's tiling lenses. (Which made me make this applet.)

Not nearly everything you could see. Do you have a favorite - list it in the comments, please! If you have ideas for a GeoGebra applet, I'd love to hear it. 

To explore further, there's a tessellation page on this blog, or a tag on my tumblr, or GeoGebra books for (mostly) tile altering tessellations and Islamic Geometric Patterns.

And happy WTD. Go cover something with a finite set of shapes and no gaps or overlaps! Might need to work on a better slogan.