Plane and solid analytic geometry; an elementary textbook (1905)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's Sons · leaf 272
Fio. 20. Fig. 21, parallel to the X-F-plane are ellipses whose axes increaseas the section recedes from the origin. Sections made byplanes parallel to the other coordinate planes are parabo- Ch. Y, § 33] QUADRIC SURFACES 25^ las, which have their axes parallel to the Z-axis. Thissurface is shown in… … 2 2 loid. li h = a, %^ + ^=2cz represents a paraboloid ofrevolution about the Z-axis.
Geometry, Analytic
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