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Plane Geometry
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Demonstrations 1261 - 1280 of 1465
Fuhrmann's Theorem
Théorème de Pascal (French)
Voronoi Diagrams
Six Incircles in an Equilateral Triangle
Hoehn's Theorem
Angle Bisector for an Angle Subtended by a Tangent Line
Bottema's Theorem
Hjelmslev's Theorem
Bennett's Octagon-to-Square Dissection
A Visual Proof of the Double-Angle Formula for Sine
A Visual Proof of the Cauchy-Schwarz Inequality in 2D
Menelaus' Theorem
Viviani's Theorem
Lindgren's Square-to-Dodecagon Dissection
Busschop's Hexagon-to-Square Dissection
Brodie's Pentagon-to-Square Dissection
Dudeney's Cross-to-Isosceles-Right-Triangle Dissection
The Three-Chord Lemma
A Product of Chord Lengths in a Circle
The Chordal Theorem
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