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Historical Mathematics
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Demonstrations 181  200 of 365
The Pigeonhole Principle  Disk Coverings
Twin and Nearly Twin Pythagorean Triples
Pythagorean Primitive Triples Using Primes
FourVariable Karnaugh Map
Archimedes's Neusis AngleTrisection
Pythagorean Theorem
Sendov's Conjecture
Primitive Pythagorean Triples 3: Ordered Tree Graph
Euclid's Construction of a Regular Dodecahedron (XIII.17)
SpaceFilling Tetrahedra
Epicycloids from an Envelope of Lines
Another Generalization of Pythagoras's Theorem
The Trammel of Archimedes
The SeeSaw Lemma
The Number of Partitions into Odd Parts Equals the Number of Partitions into Distinct Parts
Da Vinci's Proof of the Pythagorean Theorem
Euclid, Book 3, Proposition 22
Tightly Packed Squares
Propositional Logic Test
A Dissection Proof of Pythagoras's Theorem
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