A heptagon in Euclidean space is not able to produce uniform tilings together with other polygons, just like the normal pentagon. Even so, it is one of fourteen polygons which can fill a airplane-vertex tiling, in its case only together with a daily triangle as well as a 42-sided polygon https://cristianvocpb.techionblog.com/37910729/considerations-to-know-about-7-day-pill-organizers