en.wikipedia.org/wiki/Parabola

A parabola is a two-dimensional, mirror-symmetrical curve, which is
approximately U-shaped when oriented as shown in the diagram ...

www-history.mcs.st-and.ac.uk/Curves/Parabola.html

Parabola. Cartesian equation: y = ax<sup>2</sup> + bx + c. Click below to see one of the
Associated ... Negative pedal curve wrt origin, Negative pedal wrt another point.

parabolaonline.tripod.com/history.html

Apollonius (262 BC - 190 BC) named the parabola; Pappus (290 - 350) found the
focus and directrix of the parabola; Galileo (1564 - 1642) saw that objects ...

www.newworldencyclopedia.org/entry/Parabola

The parabola is found in numerous situations in the physical world (see below).
... In polar coordinates, a parabola with the focus at the origin and the directrix on
...

www.2dcurves.com/conicsection/conicsectionp.html

The word 'parabola' refers to the parallelism of the conic section and the tangent
of the conic mantle. Also the parable has been derived from the Greek ...

jwilson.coe.uga.edu/EMT668/EMAT6680.F99/Erbas/emat6690/Insunit/parabola/parabola.html

Mar 5, 2000 ... Lesson I: Definition and geometric construction of a parabola ... Thus the general
equation of the parabola with vertex at the origin (0,0) and ...

www.intmath.com/plane-analytic-geometry/4-parabola.php

Feb 24, 2016 ... This section contains the definition of a parabola, equation of a ... ∣p∣ (Distance
from the origin to the focus, and from the origin to the directrix ...

www.carondelet.pvt.k12.ca.us/Family/Math/03210/page2.htm

The History | Definition | Breakdown of the Equation. The History ... Pappus (290
to 350) considered the focus and directrix of the parabola. Pascal (1623 to ...

www.cut-the-knot.org/ctk/Parabola.shtml

(Note that the word parameter has the same Greek origin as parabola and
signifies an attribute of a mathematical object given either alongside other
attributes ...

www.parabola.unsw.edu.au/content/history

Dec 16, 2016 ... History. 50 years of Parabola The first issue of Parabola appeared in ... The main
focus of Parabola at this time was to provide mathematical ...