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Demonstrations 21 - 40 of 1056
Pi = 4?
Making a Strip of Isosceles Trapezoids
Guessing the Symmetry Group
Pythagorean Theorem for Regular Polygons
Area of Parallelogram in Terms of Its Diagonals
Construction of Squares from a Parallelogram
Folding a Strip into a Pentagon
Four Visual Proofs of a Theorem about a Regular Nonagon
Arbitrary Curves of Constant Width
Representations of Trigonometric and Hyperbolic Functions in Terms of Sector Areas
Loyd's Dissection of a Square to Five Different Figures
Folding a Rectangle into an Envelope
The Obedient Reflected Ray
Dissection of a Square and an Isosceles Right Triangle into a Square
Another Variant of Kosnita's Theorem
Number-Theoretic Construction of Digital Circles
Center of Mass of a Perforated Square Plate
Concurrent Diagonals in a 30-Gon
Minimum Distance Explorer: Circle to Enclosed Polygon
Trisecting an Angle Using the Cycloid of Ceva
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