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High School Geometry
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Demonstrations 1  20 of 309
Spinning Out Sine and Cosine
Updated this month
Intersecting Circles
Doubling a Distance with a Compass
Enlargement in Two Dimensions
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
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