directrix - Hutchinson encyclopedia article about directrix Printer Friendly
The Free Dictionary
1,136,525,003 visitors served.
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

conic section
(redirected from directrix)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.04 sec.

conic section

Enlarge picture
The four types of curve that may be obtained by cutting a single or double right-circular cone with a plane (two-dimensional surface).

Curve obtained when a conical surface is intersected by a plane. If the intersecting plane cuts both extensions of the cone, it yields a hyperbola; if it is parallel to the side of the cone, it produces a parabola. Other intersecting planes produce circles or ellipses.

The Greek mathematician Apollonius of Perga wrote eight books with the title Conic Sections, which superseded previous work on the subject by Aristarchus and Euclid.



How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
 Email
Feedback
?Sign in SSL protected
Email:
Password:
Register

? Mentioned in ? References in periodicals archive
 
A 21,000-square-foot building on the same property is leased long-term to Directrix.
Japan Express moves facility to Kessel's Northvale facility by Real Estate Weekly
Cohen currently sits on the board of three other public companies -- Cross Media Marketing (AMEX: XMM); Directrix (OTCBB:DRCX); and Greg Manning Auctions (Nasdaq: GMAI) -- as well as Interlink, a privately held magazine wholesale and distribution company.
Pipeline Data Appoints Richard Cohen as President by Business Wire
A 21,000 SF building on the same property is leased long-term to Directrix.
[0] Jeffrey A. Kessel by Real Estate Weekly
More results
 
Hutchinson browser? ? Full browser
 
 
Hutchinson Encyclopedia
?

Disclaimer | Privacy policy | Feedback | Copyright © 2008 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.