## Conic Sections: An Introduction

A **conic section** is a curve formed by the intersection of a cone with a plane. Depending on how the plane is oriented, the curve will be one of the conic sections — **circle**, **ellipse**, **parabola**, or **hyperbola**:

- A
**circle**is the set of all points that area equally distant from a fixed point C, the center of the circle. - An
**ellipse**is the set of all point surrounding two foci, or focus points, such that the sum of the distances from any point to each focus remains constant. An ellipse canbe oriented vertically (shaped higher than wide) or horizontally (shaped wider than high). - A
**parabola**is the set of points that are equqally distant from the focus point and the directrix, a fixed line. A parabola can be oriented vertically (opening up or down) or horizontally (opening left or right). - A
**hyperbola**is the set of all points around two foci, or focus points, such that the difference of the distances from any point to each focus remains constant. A hyperbola can be oriented vertically (opening up and down) or horizontally (opening left and right).

## Equation of a Vertical Ellipse

With this Tab Tutor program, you’ll learn about the equation of a vertical ellipse and how to use it to derive the foci, vertices, and minor axis. A useful glossary also introduces you to other features like the latus rectum and major axis.