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Recreational Mathematics
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Demonstrations 821  840 of 1045
Golden Spiral
Letter Products
Bilinski's Vase
Deriving a Bilunabirotunda from Rhombic Solids
Cube Packing
Two Operations on Rhombic Solids
Gematria (Letter Sums)
Pandigital Olympic Circles Puzzle
Dissection of Two Truncated Octahedra into a Cube
Dissection of a Cube into Two Kinds of Triacontahedra
Dissection of Three Bilunabirotundas and a Dodecahedron into Rhombic Solids
Proof of Proposition 28, Book XI, Euclid's Elements
Another Dissection of Two Rhombic Solids into an Icosidodecahedron and a Rhombicosidodecahedron
Dissection of the Oblate Golden Rhombohedron
Definitions of Hill's Tetrahedra
SixPiece Dissection of Hill's Tetrahedron of Type 3 into a Triangular Prism
FourPiece Dissection of Hill's Tetrahedron of Type 2 into a Triangular Prism
Dissection of Hill's Tetrahedron of Type 1
Two Proofs of the Equality of the Volumes of a Box and a Parallelepiped
Swirl Points
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