On Mon, Mar 26, 2018, at 4:04 PM, David Mitchell wrote:
> There are also the triakis polyhedra which can be derived through this > process, though they appear to be special instances I believe the -kis polyhedra (triakis, tetrakis, pentakis) are derived by raising the centers of the faces of the original polyhedra so as to form triangular faces of a constant dihedral angle. By contrast, some of the Archimedean solids have different dihedrals depending on which types of polygons meet at an edge. The website http://dmccooey.com/polyhedra/ has interactive models of hundreds of polyhedra in amazingly abstruse categories, and exhaustive data on each. The interface could be a little more user friendly, but clicking on the boxes and playing around a bit is worth the effort. Scott
