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Geometry
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Demonstrations 3461 - 3480 of 3914
Conjecture de Beraha pour les roues (French)
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
Elementary Cellular Automaton Egg
Menelaus' Theorem
Viviani's Theorem
Convex Golden Rhombic Polyhedra
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
Secant Intersection with Two Internally Tangent Circles
How the Altitude Divides the Hypotenuse
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