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Demonstrations 2081 - 2100 of 3020
An Efficient Test for a Point to Be in a Convex Polygon
A Collinearity Involving an Excircle, the Incircle, and the Circumcircle
D'Arcy Thompson's Affine Fish Transformations
The Ratio of Surface Area to Volume for a Cube and a Sphere
Lamé's Ellipsoid and Mohr's Circles (Part 1)
The Desargues Configuration
Points Symmetric to the Orthocenter with Respect to the Sides of a Triangle
Visual Computation of Three Geometric Sums
Reflections of a Point in the Midpoints of a Triangle's Sides
Three Circumcenters Concyclic with a Fourth Point
Products Determined by a Point on the Circumcircle
Metamorphic Soccer Ball
Division of an Angle Bisector by the Incenter
Drilling a Hexagonal Hole
Perpendiculars from a Point on the Line between the Endpoints of the Angle Bisectors
Concyclic Points Associated with an Angle Bisector and an Excircle
Dividing a Triangle by Lines Parallel to Two Sides
Subtriangles Formed by Concurrent Lines Parallel to the Sides of a Triangle
Reflecting a Point through the Midpoints of a Triangle's Sides
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