license: This image is a derivative work of the following images: File:Gitterpolygon.svg licensed with PD-self 2008-11-03T13:51:36Z RokerHRO 360x360 (4706...
DescriptionGitterpolygon.svg English: grid polygon illustraring Pick's theorem Deutsch: Gitterpolygon, zur Veranschaulichung des Satzes von Pick Français :...
