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Izidor Hafner
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Demonstrations 601  620 of 817
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
Simultaneous Approximation of Two Real Numbers by Rationals
Dissection Proof of the Addition Formula for Sines
Dissection of a Pentagon to Almost a Square
Binary Card Game
Mazes on Riemann Surfaces
Find a Solid that Matches the Net
Dissection of Bilunabirotunda into Two Pentagonal Dipyramids and a Rhombic Dodecahedron of the Second Kind
Find a Formula for Pi
Vector Addition is Commutative
Factoring Gaussian Integers
Is the Given Function Injective?
Locate Important Real Numbers
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