During maths we learnt about a puzzle called “The seven bridges of Klonigsberg” In this puzzle the people of Klonigsberg pondered whether it was possible to cross every bridge in Klonigsberg without crossing any bridge twice. 
The puzzle was given to Leonhard Euler in the 1730’s and when Euler solved the problem he invented a whole new branch of mathematics called topography. If a shape or set of lines has either 2 or 0 vertices with an odd number of lines going through it then you can draw the shape without taking your pen of the page. Some of us were challenged to make our own shapes like these so we did-
This is mine- By Callum
Can you draw this shape without taking your pen off of the page?
what program did you use to do this drawing ? I have a similar drawing that I’m working on and can’t find the program
Sorry, Callum no longer goes to our school and no-one else seems to know.