Ed Southall (@solvemymaths) shared this puzzle (the N=4 version) posted in his staffroom. I thought it might be nice to generalize. You can do geometry for N=4, I know, but to solve in general I used trigonometry as well.[br][br]Original post: [url]http://solvemymaths.com/2015/12/11/circle-puzzle-2/[/url]