A Porism for Cyclic Quadrilaterals, Butterfly Theorems, and Hyperbolic Geometry

Author: Izmestiev Ivan  

Publisher: Mathematical Association of America

E-ISSN: 1930-0972|122|5|467-475

ISSN: 1930-0972

Source: American Mathematical Monthly, Vol.122, Iss.5, 2015-05, pp. : 467-475

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Abstract