Hyperbolic Parabaloid Small 256×320 Medium 511×640 Large 818×1024 Download Tiff Original 1918×2400 | (161.2 KB) Description Three dimensional representation of a 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
