An ellipse is the set of all points in a plane for which the _________ of the distances from two fixed points is a constant.
A) product
B) quotient
C) sum
D) difference

Question

Quizplus · Accepted Answer

The definition of an ellipse is that it is the set of all points in a plane such that the sum of the distances from two fixed points (called foci) is a constant. Therefore, the correct choice is C, as it describes the sum of distances from the foci.

An Ellipse Is the Set of All Points in a Plane