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Demonstrations 2261 - 2280 of 2957
Dissecting a Rhombic Dodecahedron into Two Solids
The Third Pedal Triangle of a Triangle
Pythagorean Triangles with the Same Area
The First Lemoine Circle
The Area of a Triangle, its Circumradius, and the Perimeter of its Orthic Triangle
Symmetric Compositions of Rhombic Dodecahedra of the Second Kind
Concurrent Lines that Intersect on the Euler Line
Collinearity of an Orthocenter, the Incenter, and the Circumcenter
Concurrent Line Segments Related to the Incircle
Projections, an Altitude, and the Orthocenter
Cubic Close Packing versus Hexagonal Close Packing
Sums of Squares of Segments Created by a Pedal Triangle
The Intersections of Extended Cevians with Three Circumcircles of Subtriangles
Tangent Lines to a Conic Section
Space Filling with Trapezoid-Rhombic Dodecahedra and Hexagonal Close Packing
Space Filling with Rhombic Dodecahedra and Cubic Close Packing
Measuring Angles with a Protractor
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