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Historical Mathematics
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Demonstrations 1  20 of 404
Kepler's Rhombic Triacontahedron and Rhombic Icosahedron
New this week
Nets for Cowley's Dodecarhombus
Euclid 1.47 Animated
FourColor Maps
Goodstein Function in Terms of FastGrowing Function Hierarchies
Alice and Jacobi in Determinantland
Minimally Squared Rectangles
Heilbronn Triangles in the Unit Square
Cassini Ovals
Graphical Solution of a Quadratic Equation Using the Arithmetic and Geometric Mean
Graphical Solution of a Quadratic Equation Using a Result from Optics
Constructing the Harmonic Mean 1
Pisot, Salem and Cyclotomic Polynomials
Degenerate Power Simplices
Doubly Recursive Integer Factorizations
Distributions of Leading Digits
Polyhedra, Spheres, and Cylinders
Right Cone Volume and Area
Hemisphere Volume and Surface Area
The Sum of Opposite Angles of a Quadrilateral in a Circle is 180 Degrees
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