Several Twin Circles

Several congruent pairs of non-Archimedean circles in the arbelos

Reference:

Hiroshi Okumura and Masayuki Watanabe, "The Twin Circles of Archimedes in a Skewed Arbelos",
Forum Geometricorum 4, 2004

Explanation:

In addition to the twin circles of Archimedes (grey circles),
there are several twin circles (congruent circles) in the arbelos.
In the diagram two circles in the same color are congruent.

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Applet programmed by Hirokazu Kato.

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