Keywords: Seven spot problem.png Solution to the following problem Arrange seven points in a plane so that if any three are chosen at least two of them will be a unit distance apart Own work based on a solution given http //mathforum org/library/drmath/view/54667 html here 2009-10-07 Optimist on the run Public Domain Geometry diagrams Images created by User Optimist on the run Moser spindle |