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Triangles
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Demonstrations 1  20 of 450
Rotating Pythagoras
New this month
The Pedal and Antipedal Triangles
New this month
Exact Trilinear Coordinates
New this month
Orthologic Triangles
New this month
Geometric Series Based on Equilateral Triangles
Generalized Straightedge and Compass Fractal
Da Vinci's Construction of an Ellipse
Signed 2D Triangle Area from the Cross Product of Edge Vectors
Three Proofs of the Pythagorean Theorem
Congruent Numbers
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 TwistHinged Dissection of Triangles
Lindgren's Dissection of a Quadrilateral to a Triangle
Decomposition of Some Polygons to IsoPenta Triangles
Spherical Triangle Solutions
Dissection of One Triangle to Another
The Begonia Point
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