Radical Axis and Radical Center
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This Demonstration illustrates the radical axis and radical center. For any point on the radical axis (or radical line), the tangents drawn to the two circles have the same length. With three circles, the three radical lines are concurrent at a point called the radical center (or power center).
Contributed by: Sandeep R. Murthy (November 2011)
Open content licensed under CC BY-NC-SA
See the Wikipedia entry for "Radical axis".
"Radical Axis and Radical Center"
Wolfram Demonstrations Project
Published: November 11 2011