Principles of modern geometry, with numerious applications to plane and spherical figures; and an appendix, containing questions for exercise. Intended chiefly for the use of junior students (1862)
Mulcahy, John, 1810?-1853 · Dublin Hodges, Smith · leaf 192
X THE SPHERICAL HYPERBOLA. 184. We have hitherto been considering only one of thedistinct portions, which together constitute the spherical conic;there is, however, another mode of dividing the curve symme-trically, which must not be omitted. This is by means of thegreat circle at right angles to… … C and C are on one of the hemispheres formed by it. These two,taken together, are called by Chasles a spherical hyperbola.Its foci are F and F a point diametrically opposite to F, (Fand F being the foci of one of the spherical ellipses), and pos-sess the following fundamental property:— The…
Geometry -- Problems, exercises, etc · Geometry
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
