Question

question 4 of 10 which of these is the best definition of an ellipse? a. the set of all points in a plane for which the difference between the distances to two fixed points equals a certain constant b. the set of all points in a plane that are equidistant from a single point and a line c. the set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant d. the set of all points in a plane that are a certain distance from a single point

Explanation:

An ellipse is defined as the set of all points in a plane such that the sum of the distances from two fixed - points (foci) is a constant. Option A describes a hyperbola, option B describes a parabola, and option D describes a circle.

Answer:

C. The set of all points in a plane for which the sum of the distances to two fixed points equals a certain constant