In this tutorial we shall study the parabola which is obtained by the intersection of the plane and a right circular cone when the plane is parallel to an element of the cone. The conic is a parabola if eccentricity is equal to 1. Following is the analytic definition of the parabola.

__Definition of Parabola__**:**

The parabola is defined as the locus of a point which moves so that it is always equidistant from a given line and a given point. The line through the focus which perpendicular to the directrix is called axis of the parabola. The point mid-way between the directrix and the focus is the vertex of the parabola. The line through the focus perpendicular to the axis and intercepted by the parabola is called the **Latus Rectum** of a Focal Chord and its length of the focal chord is called the **focal width**.

There are so many applications of parabola in everyday life, for example if throw a ball it will attain the parabolic path or when fighter jet fire a missile it will also moves in a parabolic path. One of the important applications of parabola is parabolic dish antenna.