Osgood, William F. (William Fogg), 1864-1943, Graustein, William Caspar, 1888-1941, joint author · New York, The Macmillan company · leaf 109
tor ofFF, the conjugate axis. Thepoint 0 is called the center ofthe ellipse; the points A, A,its vertices. The line-segments AA andBB, which measure the length and breadth of the ellipse,are known respectively as the major axis and the minoraxis of the ellipse. The word axes refers sometimes tothe… … Hence AA=2a and OA = a. Thus it appears that the length of the semi-axis major, OA,is a. Let the length of the minor axis be denoted by 26, andthe distance between the foci by 2 c. Then, from the triangleFOB, we have:(2) a* = V + c\ Note that, of the three quantities a, b, and c, the quantity ais…
Geometry, Analytic
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