| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a puzzle which is a regular icosahedron or the like formed by only connected elemental polyhedrons having identical shapes and has a sufficiently enjoyable difficulty and to provide an accessory which can also provide enjoyment of a puzzle. <P>SOLUTION: The puzzle is formed by joining sides of trigonal pyramids each of which has one of equilateral-triangular bases of the regular icosahedron as its base and has the center of the regular icosahedron as its apex in such a way that their angles are variable or by joining sides of two or more trigonal pyramids into one rod-like body in such a way that their angles are variable. The degree of difficulty of the puzzle can be designed depending on which sides are joined. The regular icosahedron can be a pendant or the like. Further, the puzzle formed from linearly arranged 16 trigonal pyramids may be an annular accessory such as a bracelet. <P>COPYRIGHT: (C)2012,JPO&INPIT |
