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 426
inclination is 450 ; find their direction in elevation. 5. A triangle ABC has the point A on the ground, and its plan is an equilateral triangle abc of 2.5 side. The shadow of ABCon the ground is a right-angled isosceles triangle with a asvertex, the parallel rays having an inclination of 45°, and… … Examples on Problems 330 and 331. 1. A cube 2 edge rests with a face on the ground, one side of the base making 400 with xy, the nearer end of this side being 1from the vertical plane. Determine the shadow on the planesof projections when the rays in plan and elevation make anglesof 45^ with and…
