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Demonstrations 5121  5140 of 6832
Planes, Solutions, and Gaussian Elimination of a 3×3 Linear System
Concyclic Circumcenters
The Intersections of Extended Cevians with Three Circumcircles of Subtriangles
Tangent Lines to a Conic Section
Space Filling with TrapezoidRhombic Dodecahedra and Hexagonal Close Packing
Space Filling with Rhombic Dodecahedra and Cubic Close Packing
Measuring Angles with a Protractor
Normalizing Vectors
The Sum of the Distances from the Orthocenter to the Vertices
Graphical Linear Programming for Three Variables
Medial Division of Triangles
The ErdösMordell Inequality
The Intersection of an Angle Bisector and a Perpendicular Bisector
Two Tangent Lines to a Parabola
Elapsed Time
Decomposing a Rhombic Dodecahedron into a TrapezoidRhombic Dodecahedron
The Perfect Venn Diagram
Radius1/2 Cellular Automata
Volume Units of Measurement
Angle Bisectors on the Circumcircle
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