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Geometry
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Demonstrations 2221  2240 of 3284
Reflective Properties of Conic Sections
Phase Space of an Intermittently Driven Oscillator
Generalized Coons Surface
The Eutrigon Theorem
A Concurrency from the Reflection of the Incircle's Contact Points across the Incenter
Concurrency via Midpoints
A Triangle Formed by the Centers of Three Circles
Concurrency Induced by a Cevian
Three Circles Defined by Chords
A Line Associated with an Excircle
Gauss's Line
Dissecting a Rhombohedron into Two Congruent Rhombohedra
Lamé's Ellipsoid and Mohr's Circles (Part 3: Meridians)
Elliptic Cylindrical Coordinates
Motion Traced on the Torus and Klein Bottle
Projecting Points on Spheres to Lower Dimensions
Twin Pythagorean Triples
Hinged Dissection of Equilateral Triangles
Combination of Triangular Patches
TriangleClosed Planar Sets
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