Stage: 3 Challenge Level: 
Each of the following shapes is made from arcs of a circle of radius r. What is the perimeter of a shape with 3, 4, 5 and n "nodes".
What happens when n is very large?
Explain the relationship between your answers and the perimeter of the original circle
Symmetry. Rotations. Circles. Visualising. Circumferences. Area. Arcs, sectors and segments. Translations. Perimeters. Reflections.
Published September 2002.
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