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A conic section is formed by the intersection of a plane with a right circular cone. The simplest conic section is a circle. Other conic sections include the ellipse, parabola and hyperbola. **Types of conic sections**: - An ellipse is a curve where the sum of the distances from any point on the curve to two fixed points (called foci) is constant. - A hyperbola is a conic section where, for every point on the curve, the absolute value of the difference of the distances to two fixed points (called foci) is constant. - A parabola is a curve where every point is equidistant from a fixed point (the focus) and a fixed line (the directrix).
