| 摘要 |
<p>A system of non-perpendicular axes is used for the construction of mathematical games of the "hinged solid" type. The embodiment of the Cuboctahedron illustrates this invention: the four tetrahedrons (7) are threaded on the system of axes (1). Pyramids (6) and tetrahedrons (8) are then inserted. Springs (4) and nuts (5) hold together the assembly. Amongst the most interesting application of the invention, there are other hinged solids comprised substantially of stacks of regular tetrahedrons and pyramids.</p> |
