# Introduction

Two nonperpendicular lines intersect at a point. If one of the lines is in a fixed position (the axis), and the other line (the generator) is rotated around the axis, then the generator creates a right circular cone with a vertex at the aforementioned point. This point divides the cone into two parts known as nappes. Along with the parabola, the circle, and the hyperbola, the |

# Components of an Ellipse

Standard (horizontal) form of the ellipse:

*(h, k)*is the centre*a*is the semi-major axis*b*is the semi-minor axis*c*is the distance from the centre to the either focus*c*can be found using the Pythagorean relation:*a*^{2}= b^{2}+ c^{2}