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To find the foci of an ellipse, given the lengths of the axes

Author:Dan Hanson

New Resources

Billard V5.2 and V6
GGB is Awesome!
Neuberg's Theorem
Visualizing the Pythagorean Identity with Sine and Cosine
Linear Systems + Relationships Between Coefficients and Solutions

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Nets of a cube
Re_Zcarre_ok
Rombs
Reflexiones y Traslaciones
F1 Math - Reflection in Coordinate Plane
LR6-01-CYU2 (Solving a linear system graphically)

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Cosine
Scatter Plot
Congruence
Equilateral Triangles
Constructions

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