Welcome to the Ellipse Module!
An ellipse is an elongated circle that was named in the third century B.C. by a Greek Mathematician named Appollonius of Perga.
Like circles, ellipses are shapes we often encounter. Look around the room you are in right now - where do you notice an ellipse?
The most common mention of ellipses is when talking about outer space and the orbits of planets in our solar system. In fact, in the early 1600s, Johannes Kepler (1571-1630) discovered that planets travel in elliptical, not circular, orbits around the Sun. Satellites and some comets also travel in elliptical paths.	KEPLER
Closer to home, we find ellipses in slices of carrots which have been prepared by cutting at an angle from the perpendicular.
So far you have learned that an ellipse is formed when a double-napped cone is cut by an inclined plane that is neither parallel nor perpendicular to the vertical axis of the cone.
This module will introduce you to ways of describing ellipses algebraically.
Before you start, print off the Notes to keep you on task page. As you work through this module, fill in the blanks. At the end, you will then have some brief notes to study from.

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