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Proof Without Words
Author:
user8760
,
Steve Phelps
Drag the points in the sketch below. What do you notice? What does this prove? How does this prove it?
GeoGebra
New Resources
Ellipse, Hyperbola and Circle as Envelopes
Linear Cross Section Exercise
Introduction
Construct a Square
Isosceles Triangle: Quick Construction
Discover Resources
Pendulum #13
Translation Screensaver
Untitled
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Continuity
Addition
Matrices
Complex Numbers
Equilateral Triangles