Circle (A48): External Okumura-Watanabe circle

Definition

The circle tangent to both (O) externally and to the two circles with center on AB, passing trough C and radius three times the radius of (O) is Archimedean. [Okumura and Watanabe 2007 (b)].

Remark

Cf. Archimedean circle 26 (the Yiu circle) and Archimedean circle 49 (the orthogonal Okumura-Watanabe circle).

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