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Eigenvector introduction
Author:
John Brennan-Rhodes
Explore eigenvectors for any 2 x 2 matrix
Move around the point to see the effect. Line turns red when the point and its image are on the same line through the origin. Animate to get a complete picture.
GeoGebra
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Writing the Equation of an Ellipse in Standard Form
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General Quadrilateral
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Intersection