From: Mike Kent Newsgroups: sci.math Subject: Re: Soccer ball Date: Thu, 09 Oct 1997 23:09:10 -0400 Dik T. Winter wrote: > > In article <343D5856.7967@iafrica.com> helix@iafrica.com writes: > > Can someone e-mail me the mathematical name for a soccer ball > > > > e.g. dodecahedron, icosahedron etc. > > It has no mathematical name as far as I know. It consists of > hexagons and pentagons. > -- > dik t. winter, cwi, kruislaan 413, 1098 sj amsterdam, nederland, +31205924131 > home: bovenover 215, 1025 jn amsterdam, nederland; http://www.cwi.nl/~dik/ "Truncated icosahedron". This is one of the convex semiregular polyhedra (Archimedean solids), all of which have fairly standarized names. See (if you can find it) "Polyhedron Models", Wenniger, Cambridge: the University Press, 1971. // m ============================================================================== From: RM Mentock Newsgroups: sci.math Subject: Re: Soccer ball Date: Fri, 10 Oct 1997 09:46:24 -0400 Dik T. Winter wrote: > > In article <343D5856.7967@iafrica.com> helix@iafrica.com writes: > > Can someone e-mail me the mathematical name for a soccer ball > > > > e.g. dodecahedron, icosahedron etc. > > It has no mathematical name as far as I know. It consists of > hexagons and pentagons. Check out: http://www.astro.virginia.edu/~eww6n/math/ArchimedeanSolid.html There are many named non-regular polyhedra. The Archimedean solids have all edges the same length, but not all faces are the same shape. The name for the soccer ball is "truncated icosahedron," not very imaginative. -- D. mentock@mindspring.com http://mentock.home.mindspring.com/index.htm