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Historical Mathematics
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Demonstrations 121  140 of 337
The Eratosthenes Machine for Finding the Cube Root of Two
Trisection by Sliding a Line
Pascal's Angle Trisection
Bolyai Memorial in Marosvásárhely
Numbers as Sets
Hippopede of Eudoxus
Mercator's Instructions: The "Organum Directorium"
Areas of the Lens and Two Lunes of Two Intersecting Circles
Collatz Conjecture on a Circle
Area under a Cycloid (II)
Cycloidal Pendulum
Sliding Along a Tautochrone Path
The Interior Angles of a Triangle Sum to Pi
The Fundamental Theorem of Algebra
Primitive Pythagorean Triples 4: Ordered Tree Matrices
Euclid's Construction of a Regular Icosahedron (XIII.16)
Newton Polygon and Branching of Algebraic Curves
The Mayan Calendar
Arecibo Signal Generator
The Spiral of Theodorus
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