Cross Reference
Cube:
“Experiment shows that cubes are invalid as structural devices, although the building industry and society in general commonly think of buildings in terms of cubes or quadrangular coordination. If you make a little cube of twelve toothpicks, and join their ends with soft rubber balls you will find that the cube wobbles and collapses whereas a tetrahedron made in the same way, with six toothpicks and soft rubber ball vertexial jointing is utterly stable. The cube becomes rhombic. Each little square will flatten down very readily. The tetrahedron is made up entirely of triangles which are the only inherently stable polygons.”
