Plane and solid analytic geometry; an elementary textbook (1905)
Ashton, Charles H. (Charles Hamilton), 1866- · New York, C. Scribner's Sons · leaf 267
Fig. 18. The section of the surface made by the X-F-plane is anhyperbola, Avith its transverse axis 2 a along the X-axis;the section made by the Z-X-plane is also an hyperbola,with its transverse axis 2 a along the X-axis; the sectionby the y-Z-plane is imaginary. Sections made by planes parallel…
Geometry, Analytic
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