Parabola
A parabola is the path of points in a plane that are equidistant from a fixed point (the focus) and a fixed line (the directrix). In math, it's also the graph of a quadratic function.
A parabola is the path of points in a plane that are equidistant from a fixed point (the focus) and a fixed line (the directrix). In math, it's also the graph of a quadratic function.
Everything is a system, and every system contains systerms.