Circles (A51a), (A51b), (A51c), (A51d), (A51e), (A51f), (A51g), and (A51h): The insquare octet


Consider the square OO1M1, where M1 is the highest point of (O1). The insquare inscribed in this triangle and in angle O has a sidelength equal to the Archimedean radius. This gives four Archimedean circles. Similarly four Archimedean circles are found related to (O2). [FvL, 3 mar 2008].

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