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Geometry
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Demonstrations 2421  2440 of 2869
Gerling's 12Piece Dissection of an Irregular Tetrahedron into Its Mirror Image
Tangent Circles
Division of the Opposite Side by an Angle Bisector
The Eyeball Theorem
Equally Distant Chords
Side Lengths Opposite Unequal Angles
Determinants Seen Geometrically
Brachistochrone Problem
Tautochrone Problem
Lattice Random Walk in 2D
Bicycle Rides
Tangents to a Circle
Tangent Chord Angle
Triangles: Scalene, Isosceles, and Equilateral
Triangles: Acute, Right, and Obtuse
A Geometrical Theorem of Leibniz
Parallelogram Slide
Double PSlide Dissection
Kelland's GnomontoSquare Dissection
Perigal's ThreeSquarestoOne Dissection
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