Rounded or Bridged Polyiamonds

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Rounded Polyiamonds are formed by joining unit equilateral triangles edge-to-edge or corner-to-corner. The cornerwise joints are regarded as solid, unlike those of polymings, which may cross at these points. and the pieces are fixed in the regular triangular grid.

  Rounded Moniamond - 1 (1 tile)

         

  Rounded Diamonds - 3 (6 tiles)

     
1 2 3      

  Rounded Triamonds - 11 (33 tiles)  The letters are George Sicherman's notation for the equivalent polyming pieces.

1 2 3 4 5 6
I P E L S A
 
7 8 9 10 11  
Y R T U J  

  For higher orders of rounded polyiamond, the number of pieces is as follows:

  Rounded Tetriamonds - 82

  

Puzzles using Rounded Polyiamonds

 

 

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