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Does an ellipse have two foci?

User Iperelivskiy
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1 Answer

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26 votes

Answer:

Step-by-step explanation:

For every ellipse E there are two distinguished points, called the foci, and a fixed positive constant d greater than the distance between the foci, so that from any point of the ellipse, the sum of the distances to the two foci equals d .

User Emmanuel Campos
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