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 304
the shortest line required. The indicesof m and n may be found by projecting tri, n as shown, andthen measuring the heights of these points above xy. Examples.—1. Two lines «</18, c^t^, each 2.5 long, whichbisect one another at 6o°, are the indexed plans of two linesAB, CD. Determine the indexed… … P2 4. Draw a triangle aoc, having ac ■2i ao = 1 3 -ll Regard ac as the plan of one edge of a regular tetrahedron ; the planof an adjacent edge AB coincides, in direction only, with ao ;complete the plan of the tetrahedron, the indices of a and cbeing 12 and 25 respectively. Unit = o. 1. Hint.—See…
