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Archimedes' Circles


Draw the Perpendicular Line from the intersection of the two small Semicircles in the Arbelos. The two Circles $C_1$ and $C_2$ Tangent to this line, the large Semicircle, and each of the two Semicircles are then congruent and known as Archimedes' circles.

See also Arbelos, Bankoff Circle, Semicircle

© 1996-9 Eric W. Weisstein