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Ellipse

A conic section which is essentially a stretched circle.

Formally, an ellipse can be defined as follows: For two given points, the foci, an ellipse is the locus of points such that the sum of the distance to each focus is constant. The standard form for the equation of an ellipse is given below.

 

 

 

Movie clip


Ellipse: Sum of distances
from the foci is constant

(182K)

 

See also

Focus, focal radius, directrices of an ellipse, area of an ellipse, hyperbola

 


  this page updated 19-jul-17
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
Copyright © 2000 by Bruce Simmons
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