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Demonstrations 41 - 60 of 1083
An American High School Mathematics Examination Question
Congruence Classes of Geoboard Triangles
Triangle Altitudes and Circumradius
Fold and Twist Algorithm for Some Regular n-Gons
Folding a Strip of Paper to Make an n-Gon
Lattice Squares of Integer Area
Folding a Strip to Form Regular Odd n-Gons
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
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