Circles (A46a), (A46b), (A46c), and (A46d): The Common tangent quadruple

Definition

Consider the four circles tangent to the common tangent of (O1) and (O2) and with their centers on the circle with midpoint MCD of CD as center passing through A5a and A5b. These four circles (A46a), (A46b), (A46c), and (A46d) are Archimedean. [Bui 2007] (extended by FvL).


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