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Math Help - Ellipse problem

  1. #1
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    Ellipse problem

    A rigid rod of length a + b is constrained to move in such a way that its two ends stay on the coordinate axes. Show that the point P on the rod traces out an ellipse (refer to attachment).

    I have no idea how to start this question. Could someone please help?
    Attached Thumbnails Attached Thumbnails Ellipse problem-ellipse.jpg  
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  2. #2
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    Google "Trammel of Archimedes".
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