Click to open image viewer. Hinged Plane Dissection, Three quadrilaterals and one triangle which can be arranged as a triangle or a quadrilateral (front side). CC0 Usage Conditions ApplyClick for more ...

This article was taken from the May 2013 issue of Wired magazine. Be the first to read Wired's articles in print before they're posted online, and get your hands on ...

This cut and glued clear plastic model has a large triangular facet on the bottom, with three equilateral triangles inside it (this facet resembles a regular tetrahedron without a base). Adjacent to ...