Answer
ellipse.
Work Step by Step
The ellipse is a curve such that for the points on the curve, the sum of the distances of the point and the two foci is constant.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 10 - Analytic Geometry - 10.3 The Ellipse - 10.3 Assess Your Understanding - Page 656: 7
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