أي الدوائر الآتية يزيد طول محيطها عن 45 م؟. دائرة

1914 , page 193 via• Washington, DC, USA: Mathematical Association of America	The Associated Harmonic Quadrilateral, Paris Pamfilos, Forum Geometricorum, Volume 14 2014 15—29
, The Elements of Geometry, in Eight Books; or, First Step in Applied Logic London, Longmans, Green, Reader and Dyer, 1874 , p	, : A History of Man's Changing Vision of the Universe 1959• Michael Henle, "Modern Geometry: Non-Euclidean, Projective, and Discrete", 2nd edition, , 2001• Translated from Postnikov's 1963 Russian book on

An exploration of twenty key images, Mathematical Association of America, 2011, p.

29

دائرة: Houghton Mifflin, Boston republished facsimile by Dover 1960, 2007 as Advanced Euclidean Geometry
دائرة: Altshiller-Court, Nathan, College Geometry, Dover, 2007 orig
دائرة: "The History of the Solution of the Cubic Equation", Mathematics News Letter 5 4 , p

in modern notation, with introductory chapters	Berlin, New York: DE GRUYTER
Altshiller-Court, Nathan, College Geometry, Dover, 2007	See in particular the bottom of p

Burago 2001 [1994], "Isoperimetric inequality", in Hazewinkel, Michiel ed.

2

دائرة: Todor Zaharinov, "The Simson triangle and its properties", Forum Geometricorum 17 2017 , 373--381
دائرة: Alsina, Claudi and Nelsen, Roger, Icons of Mathematics
دائرة: ; Askey, Richard; Roy, Ranjan 1999