Ellipses: Introduction

Like circles, ellipses are found all around us. For example, if you rotate an ellipse, you will create a football. Ellipses are also used in architecture. For example, in the old House of Representatives, there is a room called the Whispering Galleries, that is shaped as an oval. In this section we are going to discuss how to graph ellipses and how to write the equation of an ellipse.