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High School Geometry
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Demonstrations 181  200 of 309
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
Triangles in the Coordinate Plane
Kaleidoscopic Polygons
Parabolas from Rays
Intersecting Lines in All Possible Ways
Intersecting a Rotating Cone with a Plane
Relation of Radius, Surface Area, and Volume of a Sphere
The EyePentagon Construction
CirclePoint Midpoint Theorem
Reflecting in Parallel Planes
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