English: A general ellipse in the Euclidean plane can be uniquely described as an implicit curve using a bivariate quadratic equation of Cartesian coordinates (x, y), or can be described in terms of its center point, semi-major and semi-minor axes, and angle
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A general ellipse in the Euclidean plane can be uniquely described as a bivariate quadratic in Cartesian coordinates, or can be described using center, semi-major and semi-minor axes, and angle