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Geometry
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Demonstrations 2301  2320 of 2737
A Geometrical Theorem of Leibniz
Parallelogram Slide
Double PSlide Dissection
Kelland's GnomontoSquare Dissection
Perigal's ThreeSquarestoOne Dissection
Dintzl's Law of Cosines Dissection
Spherical Product of Two Superformulas
Constructing a Regular Pentagon with Ruler and Compass
Centroid Hexagon
Hunger's Law of Cosines Dissection
Van Aubel's Theorem for Quadrilaterals
The Perpendicular Bisectors of a Triangle
Addition Formula for Sine
Curvature of the Trefoil Knot
Skew Lines
Designs by Colorful Circles
The Polar Equations of Hearts and Flowers
Intersection of Two Cylinders
The Ratio Theorem
The Butterfly Theorem
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