Hyperbolic Parabaloid Small 320×233 Medium 640×466 Large 1024×745 Download Tiff Original 2400×1746 | (202.6 KB) Description Two dimensional representation of variable hyperbola moving parallel to itself along the parabolas as directrices. Keywords directrix, hyperbola, parabola Galleries Analytical Geometry Source: Encyclopaedia Britannica (New York: The Encyclopaedia Britannica Company, 1910) 11:719
