(3.3.4**π/6;3.4*π/6.4**π/6.4*π/6)
 
 
  data146/E253
(Click on image for high-quality PDF version)
 
 
 
 data146/E253
(Click on image for high-quality PDF version) 
 
Geometry
 
 
-  The symmetry group of the tiling is 2*22 (cmm).
-  All the internal angles of the constituent polygons are a multiple of 30°.
-  Contains one equilateral triangle.
-  Contains one regular four-pointed star polygon with vertex angle of 30°.
-  The tiling does not satisfy the two-colour condition.
-  The tiling is edge-to-edge.
-  As drawn, contains about 172 polygons.
 
References
 
 
Publications referenced: 
 
 
-  Exercise 2.5(3) of B Grünbaum and G C Shephard. Tilings and Patterns, W H Freeman,	1987.	ISBN 071671193.  [gands]  {Most important work in this area.}
-  Figure 7 of Joseph S. Myers. 2-uniform tilings ..., www.polyomino.org.uk,	2009.	 [myers2]  Available on Internet.
Collections of similar tilings
 
 
 
  Photo?  
   v54