A heptagon in Euclidean space is struggling to crank out uniform tilings alongside other polygons, just like the common pentagon. On the other hand, it is among fourteen polygons that will fill a airplane-vertex tiling, in its case only along with a regular triangle and a forty two-sided polygon (3. https://connercvjwi.blogzet.com/7-day-pill-organizers-for-dummies-52577966