Surfaces {paraboloid} can have sections that are parabolas. x^2 / a^2 + y^2 / b^2 = 2*c*z {elliptic paraboloid}, where a b c are axes. Elliptic paraboloid with a = b is parabola rotated about its z-axis. x^2 / a^2 - y^2 / b^2 = 2*c*z {hyperbolic paraboloid}, where a b c are axes.
Mathematical Sciences>Geometry>Solid>Surface>Kinds
3-Geometry-Solid-Surface-Kinds
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Date Modified: 2022.0224