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Geometry
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Demonstrations 2401  2420 of 3216
Two Ways to Fold a Net into a Biaugmented Triangular Prism
Dissection of a Cube into a Cuboctahedron and an Octahedron
Kempe's Angle Adder
Kempe's Angle Trisector
Distance between Two Points
Dirac Matrices in Higher Dimensions
The Sum of the Exradii Minus the Inradius
Three Ways to Fold a Net into a Snub Disphenoid
Product of Two LeviCivita Tensors with Contractions
Ceva's Theorem
A Triangle Inequality Involving the Altitudes, Semiperimeter, Inradius, and Circumradius
Triangle Altitudes and Inradius
Angle Bisectors in a Triangle
Inscribing Four Circles in a Triangle
Routh's Theorem
Stewart's Theorem
The Semiperimeter and Tangents to Excircles
A Line Parallel to a Side of a Triangle
The Distance to the Orthocenter from a Vertex
Two Midpoints of a Trapezoid
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