This Geometer's Corner stems from work I am doing on a book that focuses on how to use GeoGebra to construct the Platonic, Archimedean, Catalan, and Kepler-Poinsot solids. I found one unifying principle for my work in using Jeff Weeks' wonderful application KaleidoTile [1], which allows you to construct the Cube-Octa and Icosa-Dodeca families (minus the Snub Cube and the Snub Dodecahedron, which are discussed in Consortium 120's Geometer's Corner: Snub Polyhedra) in a way that shows how the solids are related to each other. All the colored polyhedral images in Figures 1 and 2 were created with KaleidoTile. In the case of the Cube Octa family, KaleidoTile transforms a Cube into a Truncated Cube that is transformed into a Cuboctahedron that is transformed into a Truncated Octahedron that is transformed into an Octahedron that is transformed into a Small Rhombicuboctahedron that is transformed into either a Large Rhombicuboctahedron or a Cube. In the case of the Icosa Dodeca family, a Dodecahedron is transformed into a truncated Dodecahedron that is transformed into an Icosadodecahedron that is transformed into a Truncated Icosahedron that is transformed into an Icosahedron that is transformed into a Small Rhombicosadodecahedron that is transformed into either a Large Rhombi cosadodecahedron or a Dodecahedron. The progression fascinated me, and I did some research to find out how it worked.
You must have a Full Membership to download this resource.
If you're already a member, login here.
COMAP develops curriculum resources, professional development programs, and contest opportunities that are multidisciplinary, academically rigorous, and fun for educators and students. COMAP's educational philosophy is centered around mathematical modeling: using mathematical tools to explore real-world problems.