A : A circle is a closed figure with eccentricity 1.
Similarly, ellipse is also a closed fig with eccentricity less than 1
and parabola with greater than 1.
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No. It can also be a circle, ellipse or hyperbola.
an ellipse, one of the four types of "conic sections": ellipse, circle, parabola, and hyperbola
He is credited with introducing the words: ellipse, parabola and hyperbola.
The various shapes are: point, straight line, circle, ellipse, parabola and hyperbola.