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Historical Mathematics
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Demonstrations 261  280 of 383
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
The Perpendicular Bisector of a Chord
Preferred Values of Collatz Paths
The Two Triangles Theorem
Boolean Algebra
Negligible Senescence Scenario
Conjecture de Beraha pour les cycles (French)
Conjecture de Beraha pour les roues (French)
The Chordal Theorem
How the Altitude Divides the Hypotenuse
Dividing a Right Triangle by the Altitude to the Hypotenuse
The Area of a Triangle as Half a Rectangle
Inscribed Angles That Intercept the Same Arc
Pappus Chain
Plots of Compositions of Bitwise Operations
Witch of Agnesi
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