The task is to proove that itīs not possible to fragment a square into hexagons. Each interior angle of the hexagons must be less than 180,but the hexagons neednīt be regular or have to be equal to each other. I tried to disprove the relation of the angles, but it didnīt work out. You neednīt give any details about the solution, but Iīm almost desperate about the time investation, so I would be grateful if you could give some small hints.