Circles (A55a) and (A55b): The outside basal pair
The circle with diameter from A to the point where A52aA52b meets
AB is the Archimedean circle (A55a). In a similar way we find (A55b). [FvL, 20 Mar 2008]
- Consider the rectangle with vertices at A, B and the points of tangency of the Powerian pairs (A52a)(A52b)
(A52c)(A52d). The perpendiculars to the diagonals of this rectangle at these points of tangency meets
AB in A55a and A55b.
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