How many ways can you join regular pentagons?

Stand-up Maths

Thanks to Jane Street for supporting this video. https://www.janestreet.com/join-jane-street/ Curved-Crease Sculptures by Erik Demaine and Martin Demaine https://erikdemaine.org/curved/ The original paper: "A Complete List of All Convex Polyhedra Made by Gluing Regular Pentagons" https://arxiv.org/abs/2007.01753 Get your hexagon equivalent here: https://arxiv.org/abs/2002.02052 Cookie. Clicker. Like that video is going to happen. https://arxiv.org/abs/1808.07540 Huge thanks to my Patreon supporters. They keep all my polyhedra convex. https://www.patreon.com/standupmaths CORRECTIONS - None yet, let me know if you spot anything! Filming and editing by Alex Genn-Bash Written and performed by Matt Parker Produced by Nicole Jacobus Music by Howard Carter Design by Simon Wright and Adam Robinson MATT PARKER: Stand-up Mathematician Website: http://standupmaths.com/ US book: https://www.penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker/ UK book: https://mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback