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Geometry
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Demonstrations 121  140 of 3165
Euclid's Formula and Properties of Pythagorean Triples
Tracing a Cyclogon: Roulette of a Polygon Rolling along a Line
Tracing a Peritrochoid
Gerwien's Simultaneous Dissection of Three Triangles of Same Area
Fate of the Euler Line and the NinePoint Circle on the Sphere
Spherical Law of Sines
Spherical Law of Cosines
Volleyball Serves
SwingandTwist Hinged Dissection of One Regular Heptagon into Eight
Dissection of an Equilateral Spherical Triangle into Two Congruent Equilateral Spherical Triangles
Logarithmic Spirals and Möbius Transformations
Sines of the Dihedral Angles of a Tetrahedron
Polar Plots Drawn by a Mechanical Linkage
Dissection of an Octagram into Five Octagrams
Blended Quadrilaterals
Joukowski Airfoil: Aerodynamic Properties
Calculating the Area of a Country Using Green's Theorem
One Point Perspective
Rotation of the Euler Line of a Triangle
Drawing Some Plane Curves Using Envelopes of Lines
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