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Historical Mathematics
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Demonstrations 141  160 of 325
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
Lewis Carroll's Diagram and Categorical Syllogisms
Hasse Diagram of Power Sets
Enumerating Pythagorean Triangles
Vičte's Nested Square Root Representation of Pi
Abacus
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