A Tetrahedrally-Symmetric Polyhedron Featuring Heptagons Posted on 3 December 2016 by RobertLovesPi Created using Stella 4d: Polyhedron Navigator; see this website to try it for yourself! Share this:EmailFacebookLinkedInPinterestPocketPrintRedditSkypeTelegramTumblrTwitterWhatsAppLike this:Like Loading... Related