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Demonstrations 2401 - 2420 of 3080
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
The Sum of the Distances from the Orthocenter to the Vertices
Medial Division of Triangles
The Erdös-Mordell Inequality
The Intersection of an Angle Bisector and a Perpendicular Bisector
Two Tangent Lines to a Parabola
Decomposing a Rhombic Dodecahedron into a Trapezoid-Rhombic Dodecahedron
Angle Bisectors on the Circumcircle
The Product of the Inradius and Semiperimeter of a Triangle
The Product of an Altitude and the Circumradius of a Triangle
Dissecting Two Rhombic Dodecahedra of the Second Kind into a Cube
An IMO Problem Involving Concurrency
The Product of the Side Lengths of a Triangle
The Medial Triangle and Concurrency at the Nagel Point
Four Concurrent Lines in a Cyclic Quadrilateral
A First Morley Triangle Concurrence
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