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 430
ow touches the latter at /0. 333. Problem.—To determine the shadow cast by agiven sphere on the ground, the given rays being parallel.To find also -the line of separation on the sphere. Suppose the sphere to be circumscribed by a cylinder,the axis of which is parallel to the given rays, then… … Examples. —1. A circle 2 in diameter has its plane parallel tothe vertical plane and 1 therefrom, its centre being 1^ abovethe ground. Determine the shadow cast on the planes ofprojection, the rays in plan and elevation making angles of350 and 400 respectively with xy. Determine the projections of…
