minimal entity page
fixed line
[fixed line|fixed line] A parabola is the set of points in a plane equidistant from a fixed point (focus) and a fixed line (directrix).
Definition
fixed line A parabola is the set of points in a plane equidistant from a fixed point (focus) and a fixed line (directrix).
Mechanism
fixed line A conic is determined by three characteristics: a single focus, a fixed line called the directrix, and the ratio of distances to a point on the graph. A parabola consists of points equidistant from a fixed point and a fixed line.
Causes
fixed line A conic is determined by three characteristics: a single focus, a fixed line called the directrix, and the ratio of distances to a point on the graph. A parabola consists of points equidistant from a fixed point and a fixed line.