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Greek Mathematics
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Demonstrations 41  60 of 82
A Dissection Proof of Pythagoras's Theorem
Enumerating Pythagorean Triangles
The Eutrigon Theorem
Twin Pythagorean Triples
An Intuitive Proof of the Pythagorean Theorem
Inscribed and Central Angles in a Circle
Distance between Two Points
Pythagorean Triangles with the Same Area
Proposition 3, Book XII, Euclid's Elements
A Lemma of Archimedes about a Bisected Segment
Tangent Points on a Semicircle
Tangent Circles and Parallel Diameters
Perpendiculars to a Chord
Proof of Proposition 28, Book XI, Euclid's Elements
Ptolemy's Theorem
Euclid's Proof of the Pythagorean Theorem
Pappus Chain
Relatively Prime Numbers and Zeta(2)
Finding the Least Common Multiple of Two Numbers by Factoring
Finding the Greatest Common Divisor of Two Numbers by Factoring
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