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Egyptian Rope
Age 7 to 11
Challenge Level 
The ancient Egyptians were said to make right-angled triangles using a rope which was knotted to make twelve equal sections.
If you have a rope knotted like this, what other triangles can you make? (You must have a knot at each corner.)
What regular shapes can you make - that is, shapes with equal length sides and equal angles?
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