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Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)

Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 90

An illustration from Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus, 1899, leaf 90
are bisected at C. A A is called the ma/or axis, and BB the minor axis ;they are respectively the longest and shortest diameters,and are sometimes referred to as the prituipal axes. It appears from the figure that PF+ FF = PL + PL = LCLC = AF+ AF = A A. Theorem 1.—Ln any ellipse the sum of the… … Theorem 2.—// may be shown that CF, CA, CD are i>igeometrical progression ; also that the eccentricity FA : AD= CF: CA = CA: CD. 76 PRACTICAL PLANE GEOMETRY chap. 78. Problem.—Having given the lengths of the majorand minor axes of an ellipse, to determine the foci. Let AA be the major axis.…

Geometry, Descriptive -- Problems, exercises, etc · Geometry, Plane -- Problems, exercises, etc · Graphic methods

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