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I think the center of gravity of an ellipse is the intersection point of it's two radius. But I didn't see it anywhere, so I'm having some doubt about it.

Am I right?

Thanks to all.

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It is right in the middle! –  user17090 Nov 7 '11 at 17:03

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up vote 2 down vote accepted

This is correct. The axes (they are not usually called radii) are axes of symmetry, so the CG has to be along them.

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ok, thank you ;) –  Gatsu Nov 7 '11 at 17:06

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