The HAT tessellation
Geometry Math and Art Current events
  An Einstein aperiodic tile has just been discovered.  Find out what that means and why it is significant.  Plus - play with the tiles.  Do you want to tile your shower floo...
4.MD 6.G 7.G 8.G 6th 7th 8th HS 5th 4th 5.G HSG 4.G tessellation tiling aperiodic periodic