Definitions
American Heritage® Dictionary of the English Language, Fourth Edition 1.n. A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the cone or by the locus of points equidistant from a fixed line and a fixed point not on the line. Century Dictionary and Cyclopedia

1.n. Same as parabole.
2.n. A curve commonly defined as the intersection of a cone with a Plane parallel with its side. The name is derived from the following property. Let the figure represent the cone. Let ABG be the triangle through the axis of the cone. Let DE be a line perpendicular to this triangle, cutting BG in H. Let the cone be cut by a plane through DE parallel to AG, so that the intersection with the cone will be the curve called the parabola. Let Z be the point where this curve cuts AB. Then the line ZH is called by Apollonius the diameter of the parabola, or the principal diameter, or the diameter from generation; it is now called the axis. From Z draw ZT at right angles to ZH and in the plane of ZH and AB, of such a length as to make ZT: ZA: BG: A B. AG. This line ZT is called the latus rectum; it is now also called the parameter. Now take any point whatever, as K, on the curve. From it draw KL parallel to DE meeting the diameter in L. ZL is called the abscissa. If now, on ZL as a base, we erect a rectangle equal in area to the square on KL, the other side of this rectangle may be precisely superposed upon the latus rectum, ZT. This property constitutes the best practical definition of the parabola. If a similar construction were made in the case of the ellipse, the side of the rectangle would fall short of the latus rectum; in the case of the hyperbola, would surpass it. The modern scientific definition of the parabola is that it is that plane curve of the second order which is tangent to the line at infinity. The parabola is also frequently defined as the curve which is everywhere equally distant from a fixed point called...

...Conics: Parabolas: Introduction (page 1 of 4)
Sections: Introduction, Finding information from the equation, Finding the equation from information, Word problems & Calculators
In algebra, dealing with parabolas usually means graphing quadratics or finding the max/min points (that is, the vertices) of parabolas for quadratic word problems. In the context of conics, however, there are some additional considerations.
To form a...

...
The Parabola
What is a Parabola?
A quadratic expression is an expression in which the highest power of is 2. Consider the following:
The above equations are all quadratic expressions as the highest power of is 2. When a quadratic function is graphed, the resulting curve is called a parabola, as demonstrated in figures 1 and 2.
Real Life Application
A quadratic function and parabola can be used when undertaking a new...

...A parabola is a two-dimensional, mirror-symmetrical curve, which is approximately U-shaped when oriented as shown in the diagram, but which can be in any orientation in its plane. It fits any of several superficially different mathematical descriptions which can all be proved to define curves of exactly the same shape.
One description of a parabola involves a point (the focus) and a line (the directrix). The focus does not lie on the directrix. The locus of...

...Conics are surprisingly easy! There are four types of conic sections, circles, parabolas, ellipses, and hyperbolas. The first type of conic, and easiest to spot and solve, is the circle. The standard form for the circle is (x-h)^2 + (y-k)^2 = r^2. The x-axis and y-axis radius are the same, which makes sense because it is a circle, and from
In order to graph an ellipse in standard form, the center is first plotted (the (h, k)). Then, the x-radius is plotted on both sides of the...

...Theory of Parabolas
By Amergin McDavid
A parabola is designed on a basic formula, Y=ax^2+bx+c, which allows it to achieve a curve not seen in a normal line graphed using a Y=mx+b format. To the left is a graph who’s formula is y=x^2, where a=1, b=0, and c=0. I have isolated the (a) factor to see its effects on the parabola.
Below is a graph where I have changed the (a) multiple times.
The result is that as the (a) decreases, the mouth of the...

...Running Head: INTELLIGENCE DEFINITION AND MEASUREMENT
Intelligence Definition and Measurement
PSYCH 525 Measurements and Statistics
February 04, 2013
Christie Seiler, Ph.D.
Intelligence Definition and Measurement
Defining and measuring intelligence remains just as controversial as it was when the first very first intelligence test was developed and administered. Over the years, various instruments have been developed, but intelligence ultimately...

...The Parable of the Sadhu
The following case first appeared in the September-October 1983 issue of the Harvard Business Review. It was written by business professor Bowen H. McCoy and is a true story
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The Nepal experience was more rugged than I had anticipated. Most commercial treks last two or three weeks and cover a quarter of the distance we travel.
My friend Stephan, the anthropologist, and I were halfway through the 60-day himalayan part of the...

...The Importance of the Parabola
What exactly is a parabola? Well it could quite possibly be the most powerful shape that our world has ever known. It is used in many designs since it is so sturdy and powerful. Countless structures and devices use the parabola and it does nothing but enhance whatever it is used in. What makes it so powerful? Just keep reading and find out.
Used in bridges, doors and buildings, the shape of the parabola...