Eight-Pointed Star and Precise Construction of 7x7 Square Grid

Dmitri Kozlov
Proceedings of Bridges 2015: Mathematics, Music, Art, Architecture, Culture (2015)
Pages 331–334 Short Papers


The paper explores two methods of constructing precise 7x7 square grid based on the eight-pointed star by Tons Brunes. Both methods are closely connected with the ancient proof of the Pythagorean theorem for 3,4,5 right triangle and ad quadratum.