Ellipses

Sources

Sources used in this book:  

CliffsNotes.com. Ellipse. 27 Jul 2010 . http://www.cliffsnotes.com/study_guide/topicArticleId-38949,articleId- 38943.html

Holt, Rinehart & Winston , "Conic Sections ." http://my.hrw.com/math06_07/nsmedia/homework_help/alg2/alg2_ch10_03_ homeworkhelp.html (accessed 7/27/2010).

Kenny Felder, "Conic Concepts -- Circles," Connexions, March 22, 2010, http://cnx.org/content/m18245/1.3/.