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Demonstrations 5821  5840 of 7268
Proof without Words: 1+2+...+(n1)=n Choose 2
Euclid's Proof of the Pythagorean Theorem
Miquel's Pentagram Theorem
Two Proofs of the Equality of the Volumes of a Box and a Parallelepiped
Covering the Plane with Polygons
Saddle Points and Inflection Points
Tangent Planes on a 3D Graph
Factoring the Sphenic Numbers
Swirl Points
Potential Flow over a NACA FourDigit Airfoil
Simson's Theorem
Johnson's Theorem
FiveSquarestoOne Dissection
Dissection of a Truncated Octahedron into Hexagonal Skew Prisms and Parallelepipeds
Dissection of Two Rhombic Solids into an Icosidodecahedron and a RhombIcosiDodecahedron
Dissection of an Oblique into a Right Prism
Taking Apart a Cube
Equidecomposition of a Rhombohedron, Hexagonal Prism, and a Rhombic Dodecahedron
Tiling Space with a SchmittConway Biprism
Dissection of a Rhombohedron into a Right Prism with the Same Base
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