A polyiamond is a polyform whose base form is an equilateral triangle. Here I used ten triangles and plotted all 448 unique forms possible (decaiamonds). See The Online Encyclopedia of Integer Sequences (oeis.org): A000577.

Decaiamonds, black on white, A3

  • Here I used ten triangles and plotted all 448 unique forms possible (decaiamonds).
  • 40×25 cm

 

 

 

 

Undecimiamonds, black on white, A3

  • All 1186 undecimiamonds: 11 connected unilateral triangles
  • 40×25 cm
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