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Demonstrations 761  780 of 892
Wristwatch as a Compass
Triangles: Scalene, Isosceles, and Equilateral
Triangles: Acute, Right, and Obtuse
Relatively Prime Numbers and Zeta(2)
Finding the Least Common Multiple of Two Numbers by Factoring
Color Blindness
The Ratio Theorem
A Rose for Valentine's Day
Calculating the Distance between Two Inaccessible Points
Finding the Greatest Common Divisor of Two Numbers by Factoring
Intersecting Chords Theorem
Opposite Angles of a Quadrilateral in a Circle
Learning the Arabic Alphabet
Direct Rule Control for 3,3 Turing Machines
Newton's Ellipse
The Primes Are Infinite
Precision Error
Airplanes and Crosswinds
Ship Sailing over the Horizon
Circles & Triangles
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