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Recreational Mathematics
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Demonstrations 621  640 of 901
The Ulam Prime Spiral
Hecks Boards
Dissecting a Rhombic Dodecahedron into Two Solids
What Color Is the Bear?
Symmetric Compositions of Rhombic Dodecahedra of the Second Kind
The FourRunner Problem
Cumulation
Decomposing a Rhombic Dodecahedron into a TrapezoidRhombic Dodecahedron
Dissecting Two Rhombic Dodecahedra of the Second Kind into a Cube
Three Ways to Fold a Net of Eight Triangles
Octahedral Vase
Sydler's Dissection of a Pyramid into a Prism
Dissecting the Triangular Hebesphenorotunda (Johnson Solid 92)
Two Ways of Folding a Sphinx into a Triangular Dipyramid
Decomposing a Rhombic Solid into a Truncated Octahedron
Bed of Nails
Dissecting a Rhombic Dodecahedron into an Octahedron and Two Tetrahedra
Dissecting a Rhombic Dodecahedron into Two Cubes
Decomposing a Cuboctahedron into Three Rhombic Dodecahedra and Two Tetrahedra
Dissection of Four Rhombic Dodecahedra into a Truncated Tetrahedron and a Tetrahedron
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