\"\"

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The area of the circle is \"\".

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The area of the ellipse is \"\".

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The are of the ellipse is double the area of the circle.

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\"\"

\

\"\".

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The legth of the major axis is \"\".

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Substitute \"\".

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\"\".

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Therfore, the length of the major axis is \"\".

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\"\"

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The length of the major axis is \"\".