Circles (A_34a) and (A_34b): Older Twins

Definition

Consider the circles through A with centers B and C. The circle tangent to these two circles and the CD from the same side as A is Archimedean. Similarly for the circles through B with centers A and C [van Lamoen 2006].

Generalization

• In stead of the circles through A with centers B and C, any two circles from a homothety with center A applied to (O₁) and (O) can be taken [van Lamoen 2006].

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