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Izidor Hafner
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Demonstrations 581  600 of 809
Mazes on Archimedean Tilings
Basis for Pure Geodetic Angles
SelfDescriptive Strings
Mazes on Various Surfaces
Tilson's SquaretoPentagram Dissection
Bradley's HexagramtoSquare Dissection
Dissecting a Cube into a Tetrahedron and a Square Pyramid
Geometric Solution of a Quadratic Equation
A Special Case of the Sum of Two Cosines
Archimedes's Neusis AngleTrisection
Method of Integer Measures
Guessing a Number Using the Chinese Remainder Theorem
Approximation of Irrationals
Projection of Earth on Polyhedra
Rational Linear Combinations of Pure Geodetic Angles, Part 2
Rational Linear Combinations of Pure Geodetic Angles
Two Visual Proofs of a Basic Trigonometric Identity
Ternary Card Game
Squares of Sine and Cosine
Proof of the Difference Formula for Sine and of the Addition Formula for Cosine
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