Quadratic Curve

September 05, 2013

Quadratic curve is also called conic section obtained as the intersection of a cone (more precisely, a right circular conical surface) with a plane.

Conic sections are exactly those curves that, for a point F (in black), a line L (also in black) not containing F and a non-negative number e, are the locus of points whose distance to F equals e times their distance to L. F is called the focus, L the directrix, and e the eccentricity.

Quadratic curve

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