Explore ellipses, parabolas & hyperbolas with adjustable parameters
Conic sections are curves formed by intersecting a plane with a cone. An ellipse (eccentricity 0 < e < 1) has two foci; the sum of distances to them is constant. A parabola (e = 1) has one focus and a directrix — every point is equidistant from both. A hyperbola (e > 1) is two branches; the difference of focal distances is constant. A circle is a special ellipse where e = 0.