Three circles of radius 6, 7, and 8 are externally tangent to each other. There exists a smaller circle tangent to all three (in the space created between the three original circles).

What is the radius of this smallest circle?

(In reply to Inversion by Bractals)

Please define the operation: inversion.  What does it mean to "invert through a circle..."  and "inverting these inverted circles..." ?

Posted by Thalamus on 2004-07-29 11:43:51