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 382
are inclined respectively at 350 and 700. Draw thehorizontal traces of the three planes, the plan of their intersec-tions, and find the inclination of the third plane.10. A right cone, 2^ high, rests with its base (of ij radius) onthe H.P. A sphere of # radius touches it externally. Drawthe true… … CHAPTER XV SURFACES IN CONTACT 302. General remarks.—Two surfaces which touch willhave a common tangent plane and a common normal at thepoint of contact. The normal at any point on a sphere isthe line joining the point to the centre ; and at any pointP on the surface of a circular cone or cylinder,…
