Stage: 3 Challenge Level: 
You may find it helpful to cut out some accurately drawn tiles and
experiment fitting them together or to cut out one tile to use as a
template and to draw the tiling by drawing the outline of your
template over and over again.
It may help to use the relationships: 2A+D=360° and 2C+D=360°.
Generalising. Pentagons. Tessellations. Small software. biology. Visualising. Interactivities. Compound transformations. Games. Reflections.
Published July 2003,August 2003.
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