# Circle (A_{49}): Orthogonal Okumura-Watanabe circle

### Definition

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

### Remark

Cf. Archimedean circle 26 (the Yiu circle) and Archimedean circle 48 (the External Okumura-Watanabe circle

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