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LOGO Challenge - Triangles-squares-stars

Age 11 to 16 Challenge Level:

These tilings really caught my imagination.

They comprise some basic shapes and the work is then to identify how to move from one drawing of the shape to the next.

Perhaps it might be useful to think of a shape not as a square say but as a square plus two sides. That is:

Repeat 6 [ fd 30 rt 90]

for example.