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High School Geometry
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Demonstrations 181  200 of 309
Einstein's Most Excellent Proof
Circles & Triangles
Pythagorean Analogs for Similar Triangles
Wittenbauer's Parallelogram
Three Points Determine a Circle
Circumcircle and Incircle of a Triangle
Common Methods of Estimating the Area under a Curve
Two Points Determine a Line
Pythagorean Means
Unfolding a Cone
Reflection in Two Dimensions
Optics: Law of Reflection
How Tall Is That Building?
Simple Stair Calculator
Indestructible Perpendicular Lines
Hippias Quadratrix
Dissection Fallacy
Carnot's Theorem
Playing with Stellations of the Icosahedron
Watt's Curve
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