## What is a parabola?

A parabola is a two-dimensional, symmetrical curve, defined by a quadratic equation. A parabola has several important properties that make it useful in many applications, from mathematics and physics to engineering and architecture. In this article, we’ll take a closer look at what a parabola is and how it can be used.

### The definition of a parabola

In mathematics, a parabola is a two-dimensional, mirror-symmetrical curve, which is approximately U-shaped when oriented as a function, but which can be more generally referred to as a conic section. A parabola is the two-dimensional figure formed when a one-dimensional line, called the directrix, is intersected by a plane at a single point not on the directrix, called the focus. The line joining any point of the curve with its corresponding focus is called the focal line of the parabola.

### The equation of a parabola

A parabola is a two-dimensional, U-shaped curve that is symmetrical about a line, called the axis of symmetry. The equation of a parabola can be written in several different forms, depending on the orientation of the parabola and the position of the formula within the coordinate system.

The most general form of the equation of a parabola is:

y = ax^2 + bx + c

where a, b, and c are constants. The value of a determines whether the parabola opens up or down, as well as how “steep” the curve is. If a is positive, then the parabola opens upward, if a is negative, then the parabola opens downward. The steepness of the curve is determined by how close to zero the value of |a| is. The closer to zero |a| is, the steeper the curve will be.

The value of b determines where along the x-axis the vertex (the point where the axis of symmetry intersects with the parabola) will be located. If b is positive, then the vertex will be located to the right of center; if b is negative, then the vertex will be located to left of center.

The value of c determines where along y-axis (the directrix) D = ½b^2/a – c ) will be located . If cis positive ,then D will be located above y ; ifcis negative ,then D will be located below y .

## What is the vertex of a parabola?

The vertex of a parabola is the point where the curve changes direction. In the case of a parabola, the vertex is the point where the parabola changes from concave to convex. The focus of the parabola is located at the vertex.

### The definition of the vertex of a parabola

The vertex of a parabola is the point at which the parabola bends or changes direction. The focus of the parabola is located at (0,0), and the vertex is located at (4,0).

### The equation of the vertex of a parabola

A parabola is a two-dimensional curve that is the set of points in a plane that are equidistant from a fixed point (called the focus) and a fixed line (called the directrix). The equation of the vertex of a parabola can be found by completing the square on the standard form equation of the parabola. The completed square will give you the equation in vertex form, which is where the x coordinate of the vertex is given by:

x = -b/(2a)

where “a” and “b” are coefficients from the standard form equation. The y coordinate of the vertex can be found by plugging in this value of x into the original equation.

## What is the focus of a parabola?

A parabola is a curve where any point is equidistant from a fixed point, called the focus, and a fixed line, called the directrix. The focus of a parabola is the point on the curve where the curve is the closest to the directrix.

### The definition of the focus of a parabola

A parabola is a two-dimensional, U-shaped curve. It is generated by a point (the focus) moving along a line (the directrix). The points of the curve are equidistant from the focus and the directrix. This distance is called the focal length.

### The equation of the focus of a parabola

A parabola is a two-dimensional, symmetrical geometric figure, usually unbounded, that is the locus of points in a plane equidistant from a given fixed line, called the directrix, and a given fixed point, called the focus. The term “parabola” derives from the Greek word meaning “to throw” or “to place side by side.” The focus of a parabola is a mathematical concept that enables its precise definition.