DescriptionEllipse Properties of Directrix.svg	English: A diagram showing some basic properties of an ellipse, including The constant of proportionality is the eccentricity, e. D, called the directrix. The ratios e=f/a=a/d=PF/PD are always constant. *The eccentricity is always between 0 and 1. At zero, the ellispe becomes a circle, at 1 the ellipse becomes a parabola. Greater than one, it is a hyperbola. Other related images Ellipse Properties Showing Construction with string.svg Ellipse Properties of Directrix and String Construction.svg These images were edited with the free open source program Inkscape
Date	2 July 2010, 19:03 (UTC)
Source	Ellipse Properties.svg:
Author	Ellipse Properties.svg: Inductiveload derivative work: Dave3457 (talk) derivative work: ElectroKid (☮ • ✍)
SVG development InfoField	The SVG code is valid.  This geometry was created with a text editor by Krishnavedala.  Please do not replace the simplified code of this file with a version created with Inkscape or any other graphical vector graphics editor This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Removed all information but the directrix. Note the location of the foci ect. were off on the original.. The original can be viewed here: Ellipse Properties.svg: .

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• File:Ellipse_Properties.svg licensed with PD-self
  • 2008-12-08T05:29:54Z Inductiveload 400x260 (30964 Bytes) Fix text?
  • 2008-12-08T05:25:44Z Inductiveload 400x260 (27156 Bytes) {{Information |Description={{en|1=A diagram showing some basic properties of an [[:en:ellipse|]], including *The distance to a focus, ''F'', from the centre ''C'', is the eccentricity, ''e'' multiplied by the semimajor axis,

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