A heptagon in Euclidean space is unable to generate uniform tilings together with other polygons, like the regular pentagon. On the other hand, it is one of fourteen polygons that may fill a airplane-vertex tiling, in its case only along with a regular triangle in addition to a 42-sided polygon https://bathroomgrabbarsforelderl03360.thenerdsblog.com/43766340/everything-about-7-day-pill-organizers