Apollonius Problem: What is it?
A Mathematical Droodle


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What if applet does not run?

The applet demonstrates an ancient geometric problem of finding a circle tangent to the given three circles. The number of solutions may range from 0 to 8.

Explanation

A particular case where the three given circles touch each other externally lends itself to only two solutions that are known as Soddy's circles.

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Copyright © 1996-2018 Alexander Bogomolny

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