Wolfram Demonstrations Project
7922

Tangent Circles to Two Circles

Given two distinct circles, the locus of the centers of all circles tangent to those two circles is a branch of a hyperbola or a staight line if the radii of the two circles are equal. The centers of the circles are the foci of the hyperbola.

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"Tangent Circles to Two Circles" from the Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/TangentCirclesToTwoCircles/
Contributed by: Abraham Gadalla




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