info prev up next book cdrom email home

Chordal Theorem

\begin{figure}\begin{center}\BoxedEPSF{RadicalAxis.epsf scaled 900}\end{center}\end{figure}

The Locus of the point at which two given Circles possess the same Power is a straight line Perpendicular to the line joining the Midpoints of the Circle and is known as the chordal (or Radical Axis) of the two Circles.


Dörrie, H. 100 Great Problems of Elementary Mathematics: Their History and Solutions. New York: Dover, p. 153, 1965.

© 1996-9 Eric W. Weisstein