In the applet below we reconstruct the underlaying girih pattern. [br]The zigzaggine lines define 2 types of polygons that appear frequently in the decoration:[br][list][*]Click on the checkbox pentagons to color the regular pentagons in the tiling. [/*][*]Click on the checkbox octagons to color the pentagons in the tiling.[/*][*]Define the midpoints of all pentagons and connect the midpoints of all tangent polygons.[/*][*]Click on the checkbox girih tiles. [/*][/list]You can see that the connecting segments coincide with the girih pattern.