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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 102

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 102
the other. 87. Problem. — Having given a pair of conjugatediameters of an ellipse, to determine the principal axes. Let 77, JJ be the given conjugate diameters. DrawJG perpendicular to and equal to CI. Join CG, and onCG as diameter describe a circle, centre O. Join JO,intersecting the circle in b… … For, join if, then by comparing with Prob. 85 it is seenthat Jij is the triangular trammel which will give the re-quired ellipse; CO, OJ is the double crank, and Jba theprincipal straight line trammel equivalent to the triangulartrammel in Prob. 85. Example.—The lengths of two semi-conjugate…

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

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