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The Ellipse - Problem 6 473 views

The definition of an ellipse is based on two fixed points, called the foci. The sum of the distances from each focus to any point on the ellipse is fixes. The foci always lie on the major axis of an ellipse at a distance "c" from the center, where a^2 - b^2 = c^2. The equation of the ellipse will tell you "a" and "b," which you use toe calculate "c."

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