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 206
of the triangle ABC into the three planes of projection.A plane is said to be rabatted when it is turned about itstrace into the plane of projection. Thus ABC is rabattedinto the horizontal plane by rotation about AB ; andinto the planes of YZ, ZX, by being turned about BCand CA respectively. (C)… … y (d) Determine and measure the angles which the plane ABCmakes with the planes of YZ, ZX, XY. Ans. 57;2°, 64.4°, 43. S°. The inclination of the plane ABC to the horizontal planeis measured hy the angle ODCo{the right-angled triangleODC. Corresponding constructions are required forthe inclinations…
