George Hart

Research Professor
Stony Brook University
Stony Brook, New York, USA
As a mathematician and sculptor, I try to show people the fun and creative sides of mathematics.
Three Lovely Structures
George Hart
These three beautiful constructions are challenging assembly puzzles. Their apparent simplicity is deceiving, so building them will stretch your visualization and problem-solving skills. Each derives from a familiar regular polyhedron---the tetrahedron, cube, and dodecahedron, respectively---yet the faces join together in a surprising way. Instead of connecting edge-to-edge as polyhedral faces do, these polygons lock together by "linking elbows" in a symmetric entanglement. Once they are built and handled for a while, their internal logic becomes clearer and they serve to illustrate the richness of the structures to be found in the mathematical world. For detailed instructions, see