Isopole

See also

Isopolar Line, Orthopolar Line

References

Bouvaist, R. Mathesis, pp. 97-101, 211-217, and 355-359, 1927.Goormaghtigh, R. "Orthopolar and Isopolar Lines in the Cyclic Quadrilateral." Amer. Math. Monthly 54, 211-214, 1947.