A heptagon in Euclidean space is unable to make uniform tilings alongside other polygons, just like the standard pentagon. Even so, it is one of fourteen polygons that can fill a airplane-vertex tiling, in its situation only alongside an everyday triangle and also a forty two-sided polygon (3. The mourners https://eduardoerbkp.blogdanica.com/37867887/not-known-factual-statements-about-7-day-pill-organizers