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anonymous

  • 5 years ago

A rectangular board is 2 by 18 units. The foci of an ellipse are located to produce the largest area. A string is connected to the foci and pulled taut by a pencil in order to draw the ellipse. Find the length of the string

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  1. anonymous
    • 5 years ago
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    it is equal to the major axis=18 unit

  2. anonymous
    • 5 years ago
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    can you be more specific ? how to solve this ?

  3. dumbcow
    • 5 years ago
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    the sum of the distances from any point on an ellipse to the foci is equal to length of major axis

  4. anonymous
    • 5 years ago
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    yes....and to have a largest area the length of major axis will be equal to the length of board

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