Fichier:Ellipse2.png

Summary

New SVG image

(Ellipse showing the pythagoras relation - modified by maaf)

Ellipse showing the Pythagoras relation a²=b²+c²

This shows an ellipse constructed from the two foci F1 and F2, with the Pythagorean formula shown as the square of the semi-major axis (a) equal to the sum of the square of the semi-minor axis (b) and the square of (c). (c) is the distance between the center to any of the foci. (c) is also the eccentricity times the semi-major axis.

Image adapted from: German wikipedia

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Source:

http://commons.wikimedia.org/wiki/File:Ellipse_PLS_en.png