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Intersecting Secant and Tangent Outside a Circle

Author:Deborah Ball

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Tangent Plane to a Sphere
General Polar Equation of Conics with Rotation
Perimeter of a Rectangle with Unknown Sides
巧算長方形周界
Parallel Lines & Related Angles: Quick Reminders

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solving 2nd degree equation
Area maxima de um gol feito com um cano de 18 m
Parametric Torus
More Complex Probabilities from Tables
Finding Angle Measures

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Conic Sections
Symmetry
Fractal Geometry
Unit Circle
Polygons

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