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Geometry
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Demonstrations 2121 - 2140 of 2696
Cofunction Identities for Sine and CosineIncircles and a CevianThe Midpoints of Two CeviansThe Quadrilateral of CentroidsThe Area of the Contact Triangle
Cofunction Identities for Sine and Cosine
Incircles and a Cevian
The Midpoints of Two Cevians
The Quadrilateral of Centroids
The Area of the Contact Triangle
Perpendiculars to a ChordDissection of a Cube into Two Kinds of TriacontahedraThe Minkowski Sum of Two TrianglesTheorem of the Owl's EyesDissection of Three Bilunabirotundas and a Dodecahedron into Rhombic Solids
Perpendiculars to a Chord
Dissection of a Cube into Two Kinds of Triacontahedra
The Minkowski Sum of Two Triangles
Theorem of the Owl's Eyes
Dissection of Three Bilunabirotundas and a Dodecahedron into Rhombic Solids
Proof of Proposition 28, Book XI, Euclid's ElementsAnother Dissection of Two Rhombic Solids into an Icosidodecahedron and a RhombicosidodecahedronDissection of the Oblate Golden RhombohedronNapoleon's TheoremArea of a Parallelogram
Proof of Proposition 28, Book XI, Euclid's Elements
Another Dissection of Two Rhombic Solids into an Icosidodecahedron and a Rhombicosidodecahedron
Dissection of the Oblate Golden Rhombohedron
Napoleon's Theorem
Area of a Parallelogram
Definitions of Hill's TetrahedraFagnano's ProblemBankoff CircleSix-Piece Dissection of Hill's Tetrahedron of Type 3 into a Triangular PrismCutting Polygons
Definitions of Hill's Tetrahedra
Fagnano's Problem
Bankoff Circle
Six-Piece Dissection of Hill's Tetrahedron of Type 3 into a Triangular Prism
Cutting Polygons

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