The application shows a set of pentagons and parallelograms in an ordered pattern.

You are invited to determine a suitable plane unit cell for this pattern. Up to 499 points or line segments can be drawn with a mouse drag action on the figure.

Ten different colours can be selected by a click on buttons  from 0 to 9 to distinguish different trials.

Click on button A to clean up your work.

The mouse coordinates can be used to report the planar unit cell position.

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Presentation