Copyright © University of Cambridge. All rights reserved.

'Egyptian Rope' printed from http://nrich.maths.org/

Show menu


The ancient Egyptians were said to make right-angled triangles using a rope which was knotted to make $12$ 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 sides and equal angles?


Click here for a poster of this problem.