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Focus-Directrix Definition of an Ellipse

Author:Norm Prokup

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Classifying Triangles
Mondrian's Puzzle
z`]]
Building Trapezoids with Set Areas
Area of a Circle Illustrated

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Prabir's Applets
Properties of Definite Integral
Pythagorean Theorem Right Angle
Spirograph-Epitrochoid
Lesson3

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Rational Numbers
Dilation
Variance
Rotation
Inequalities

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