Conic Section
Pronunciation: /ˈkɒn ɪk ˈsɛk ʃən/ ?
A conic section is a 2dimensional figure formed by
intersecting
the surface of a 3dimensional double
cone
with a
plane
(see figure 1).^{[1]} Four 2dimensional figures that can be formed are the
circle,
ellipse, parabola, and hyperbola. Conic sections were studied as early as 200 BC by
Apollonius of Perga.


Figure 2: Table of Conics, Cyclopaedia, 1728. Click on picture to see full size.


References
 conic section. merriamwebster.com. Encyclopedia Britannica. (Accessed: 20100105). http://www.merriamwebster.com/dictionary/conic section.
 Drew, Rev. W. H.. A geometrical treatise on conic sections, 4th edition. MacMillan and Company, 1869. (Accessed: 20100119). http://www.archive.org/stream/cu31924031271509#page/n6/mode/1up.
 Hamilton, Rev. Henry Parr. An Analytical System of Conic Sections, 5th edition, art. 7980. John W. Parker, 1863. (Accessed: 20100119). http://www.archive.org/stream/ananalyticalsys00hamigoog#page/n93/mode/1up/search/conic.
Cite this article as:
Conic Section. 20100105. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/c/conicsection.html.
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Revision History
20081011: Changed definition to refer to the 'surface' of a double cone (
McAdams, David.)
20080707: Corrected link errors. Corrected spelling (
McAdams, David.)
20080428: Initial version (
McAdams, David.)