conic sections

Question

A conic section with eccentricity e = 1 is a

RankGuru · Accepted Answer

The eccentricity $e$ identifies the type of conic section:
- **$e = 0$**: Circle (special case of ellipse).
- **$0 < e < 1$**: Ellipse.
- **$e = 1$**: **Parabola**. It is the transition state between closed and open curves.
- **$e > 1$**: Hyperbola.
For a parabola, every point is at the same distance from the focus as it is from the directrix (ratio $1:1$).

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conic sections

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