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Izidor Hafner
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Demonstrations 381  400 of 787
Nine Summits Quiz
Three Hinged Dissections of Squares
Dissection of a Cube into Three Bilunabirotundas, a Dodecahedron, and a Smaller Cube
A Dissection of a Prolate Golden Rhombohedron
Find the Opposite Face
Deriving the Formula for the Area of a Parallelogram
Some Archimedean Solids in the Icosahedral Lattice
Implicit Function Transformations Quiz
Dissecting an Equilateral Triangle into Four Equilateral Triangles
NewtonLeibniz Formula Test
The Ellipsograph, a Mechanism for Constructing an Ellipse
Curves and Surfaces of Constant Width
Mazes on Polyhedra Seen from Two Viewpoints
Sum of Volumes of Several Platonic and Archimedean Solids
A Subset of Phi Space
Minimum Number of Managers
Nonlogarithmic Slide Rule
Nomogram for the Geometric Mean
Dissecting a Square to Four Squares
Elementary Transformations of a Sine Wave Quiz
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