We apply Ptolemy’s theorem to regular polygons, obtaining integer rings. They are essential for creating substitution rules for quasiperiodic tilings using rhombic tiles. We discuss this in detail for tilings of 5-, 8-, and 12-fold rotational symmetry. Fractals are hidden in these tilings. We make them visible by using image manipulation or special substitution rules.

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Quasiperiodic Tilings from Ptolemy’s Theorem as Applied to Regular Polygons

  • Peter Stampfli,
  • Theo P. Schaad

摘要

We apply Ptolemy’s theorem to regular polygons, obtaining integer rings. They are essential for creating substitution rules for quasiperiodic tilings using rhombic tiles. We discuss this in detail for tilings of 5-, 8-, and 12-fold rotational symmetry. Fractals are hidden in these tilings. We make them visible by using image manipulation or special substitution rules.