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Recreational Mathematics
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Demonstrations 681  700 of 963
Problems on Circles VI: Poncelet Transversals
Sections of the 16Cell
Overhanging Cards
Hinged Dissections: From Equilateral Triangle to Square
Equilateral Triangle to Square
Spirals!
Moving the Vertices of the Great Rhombicuboctahedron
NoFourInPlane Problem
Intrinsically Knotted Graphs
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
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
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