parabolas

4 days ago · A parabola (plural "parabolas"; Gray 1997, p. dompet pria branded lokal 45) is the set of all points in the plane equidistant from a given line L (the conic section directrix) and a given point F not on the line (the focus). why so lonely The focal parameter (i e , the distance between the directrix and focus) is therefore given by p=2a, where a is the distance from the vertex to the directrix or focus The surface of revolution