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 92
urve should now be drawn through the points i> 2v 3]/ 81. Mechanical method of describing an ellipse. Insert pins at F, F, B. Take a piece of fine string,pass it round the pins so as to form a triangle FBF, andtie the ends tightly together. Replace the pin B by asharply-pointed pencil, with… … F A Examples. — 1. The lengths of major and minor axes of an ellipseare 4 and 3 respectively; determine and measure the dis-tance between the foci. A us. 2.64. 2. The major axis of an ellipse is 3.6 long, and the foci are 2.3 apart ; find the length of the minor axis. Ans. 2.78. 3. The minor axis…
