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Demonstrations 5081  5100 of 6802
Projections, an Altitude, and the Orthocenter
Astronomical Units of Length
Cubic Close Packing versus Hexagonal Close Packing
Onion Polyhedra
The Generalized WeierstrassRiemann Functions
Sums of Squares of Segments Created by a Pedal Triangle
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
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