Talk:Parabola

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Definition: The planar curve formed by the points that lie as far from a given line (the directrix) as from a given point (the focus). [d] [e]

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I'll be adding the more familiar equation-based description next. --Holger Kley 02:00, 10 December 2007 (CST)

Diagram

I wonder whether the diagram really depicts a parabola. It seems as if the two branches ultimately are parallel to the y-axis. Compare with:

CC Image

--Paul Wormer 16:48, 16 March 2010 (UTC)