A heptagon in Euclidean Place is unable to deliver uniform tilings along with other polygons, much like the normal pentagon. On the other hand, it is among fourteen polygons which can fill a airplane-vertex tiling, in its case only together with a regular triangle plus a forty two-sided polygon (3. https://senioraidtools.com/10-easy-mobility-exercises-for-seniors-to-stay-active-and-independent/