Parabola With Focus and Directrix Small 283×320 Medium 567×640 Large 907×1024 Download Tiff Original 2125×2400 | (571.2 KB) Description Illustration of a parabola - a curve which is the locus of a point that moves in a plane so that its distance from a fixed point in the plane is always equal to its distance from a fixed line in the plane. Keywords conic sections, directrix, focus, parabola, parabolas, section Galleries Conic Sections: Parabolas Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 409
