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Demonstrations 21 - 40 of 458
Signed 2D Triangle Area from the Cross Product of Edge Vectors
Three Proofs of the Pythagorean Theorem
Halving the Perimeter of a Zigzag Polygon
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
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
Dissecting One Equilateral Triangle into Seven
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