Filling in a square
- chris cambré
A Persian handwriting, kept in the Paris Bibliothèque Nationale contains a number of drawings with written instructions, to be used for decorations. Prof. Jan Hogendijk writes about it in the magazine Wiskrant. In one of them a square is divided into four kites and a smaller square.
- Mark on every edge of a square with edge a distance b < a/2.
- Connect these points by segments.
- Fold de the four triangles on these segments to form a smaller square in the middle with an edge of x.