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High School Geometry
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Demonstrations 21  40 of 309
Bézier Curve Approximation of an Arc
How Many Gallons in My Pool?
Equal Cores and Shells in Circles and Spheres
Haberdasher's Problem
Four Concyclic Points
Cross's Theorem
Albrecht Dürer's Heptagon of 1525
How to Avoid a Collision
Lemniscate Linkage
Matrix Transformations: "F"
Circumscribing Polygons
Simple Inequalities in the Unit Cube
Archimedes' Approximation of Pi
Angle and Length Measurement of a Polygon
NinePoint Circle
Geometric Elements of a Circle
Sine, Cosine, and Tangent Using Ratios of Sides of a RightAngled Triangle
Triangle Circles and Spirals
Triangle to Parallelogram
Tangent Circle and Arbelos
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