Snyder, Virgil, 1869-1950, Sisam, Charles Herschel, 1879-, Hill, Theodore Preston. Early American mathematics books. CU-BANC · New York, H. Holt and Company · leaf 89
The sections by the planes x =k are the congruent parabolas Their vertices describe the parabola The form of the surface is indicated by Fig. 28. … FIG. 28. If a = b, the paraboloid isthe surface of revolutiongenerated by revolving the x2parabola — = 2 nz, y = 0 about the Z-axis. 61. The hyperbolic paraboloid. The surface definedby the equation is called an hyperbolic paraboloid. The surface is symmetric as tothe planes x = 0 and y = 0, but…
Geometry, Analytic
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