# Focus and Directrix in a Quadratic Bézier Curve

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Any quadratic Bézier curve (with unit parameter ) represents a parabolic segment. This Demonstration illustrates the relationship between the disposition of the points and the vertex, locus, and directrix of the corresponding parabola.

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Contributed by: Alexis Luengas Zimmer (October 2012)

Based on a program by: Isabelle Cattiaux-Huillard and Gudrun Albrecht

Open content licensed under CC BY-NC-SA

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