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Demonstrations 1 - 20 of 442
Three Proofs of the Pythagorean Theorem
Halving the Perimeter of a Zigzag Polygon
Trisecting an Angle Using the Cycloid of Ceva
Geometry of Cubic Polynomials
Decomposition into Isosceles Triangles with Angles That Are Multiples of Pi/4
A Twist-Hinged Dissection of Triangles
Lindgren's Dissection of a Quadrilateral to a Triangle
Decomposition of Some Polygons to Iso-Penta Triangles
Spherical Triangle Solutions
Dissection of One Triangle to Another
The Begonia Point
An Application of the Gergonne-Euler Theorem
Dissection of Five Equilateral Triangles into One
Dissection of a Sphinx into a Triangle
Obtuse Random Triangles from Three Parts of the Unit Interval
How the Trigonometry Functions Are Related
Obtuse Random Triangles from Three Points in a Rectangle
A Geometric Limit Problem
Cylinder Area Paradox
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