Posted at 16:36h
The present invention relates to sets of educational blocks having particular shapes and volumetric relationships which may be used for the visualization and manipulation of geometric relationships. Sets of blocks having specific interrelationships are well known and have been described for educational and entertainment use. U.S. Patent 4,317,654 to Whal shows a cube which is cut up to form particular polyhedra. The U.S. Patent 3,208,162 to Wysdom describes a square root and cube root three-dimensional model. U.S. Patent 595,782 describes a block model wherein a cube is divided into volumetric fractions such as one- third, two-thirds, and the like. U.S. Patent 3,645,535 to Randolph describes various relationships between cubes, tetrahedrons and octohed- rons as these shapes relate to a cubic block. Many puzzles have been devised in which a number of blocks or tiles are selected from a larger number of blocks or tiles and are used to create a construction.