Four Polyhedra with 7-Fold Pyramidal Symmetry Posted on 2 January 2023 by RobertLovesPi 1 I made these four polyhedra using Stella 4d, which you can try for free right here. Share this:EmailFacebookLinkedInPinterestPocketPrintRedditSkypeTelegramTumblrTwitterWhatsAppLike this:Like Loading...