Question

1. describe the difference between a circle and an ellipse (make sure to use the word \focus\ or \foci\ in your answer):

Explanation:

A circle is a special type of ellipse. In a circle, there is one center point (which can be thought of as a single - focus case in a sense), and all points on the circle are equidistant from this center. An ellipse has two foci, and the sum of the distances from any point on the ellipse to the two foci is constant.

Answer:

A circle has one center (a single - focus equivalent in a sense) with all points at equal distance from it. An ellipse has two foci, and the sum of the distances from any point on the ellipse to the two foci is a constant value.