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Historical Mathematics
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Demonstrations 21  40 of 385
A Visual Proof of Thales's Intercept Theorem
Euclid's Formula and Properties of Pythagorean Triples
Fate of the Euler Line and the NinePoint Circle on the Sphere
Ramanujan's Strange Formula for Pi
Tetrahedron Centers
Mondrian Art Problem
Vega's Tables of Common Logarithms to Seven Decimals
The Klein Configuration
Babylonian Algorithm for Computing Square Roots
Gettysburg!
Marquand's Representation of Boolean Functions
Using Bernoulli's Formula to Sum Powers of the Integers from 1 to n
Lewis Carroll's Diagrams
Duffin's Sequence for Pi
The 196 Algorithm, ReorderandAdd Algorithm, and RATS Sequence in Different Bases
Golomb Rulers and Fibonacci Sequences
Pál Joints
Cassini Ovals
Wheels of Powered Triangles
Rational Distance Problem
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