Perimeter (Geometry)

circumference

circumference Distance round the boundary of a plane geometric figure, nearly always applied to a circle, for which it has the value 2πr, where r is the radius.

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"circumference." World Encyclopedia. 2005. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

"circumference." World Encyclopedia. 2005. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O142-circumference.html

"circumference." World Encyclopedia. 2005. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-circumference.html

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circumference

circumference XIV. — (O)F. circonférence — L. circumferentia; see CIRCUM-, -FEROUS.

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T. F. HOAD. "circumference." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

T. F. HOAD. "circumference." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O27-circumference.html

T. F. HOAD. "circumference." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-circumference.html

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