Parallelograms inscribed in ellipses (en Anglais)
Parallelograms inscribed in ellipses?.
The following surprising property of ellipses wasobserved by the physicist Jean-Marc Richard inconnection with a problem from ballistics.
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What are the parallelograms inscribed in anellipse with maximal perimeter and in what pointsthis maximum is reached ?
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In other words, the maximal perimeter of aparallelogram inscribed in a given ellipse can berealized by a parallelogram with one vertex at anyprescribed point of the ellipse.?
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