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 336
fined by anytwo spheres inscribed in it, for if these two spheres aregiven, then the line of the axis, the position of the vertex,and angle of the cone are known. One of the spheres maybe at the vertex and so become a point; thus a cone ofindefinite length is defined by its vertex and an… … specified whether the two external or two internal tangentsare to be taken. As before, one of these circles may be apoint, i.e. be the vertex of the cone. Similar remarks applyto a cylinder of indefinite length, but now the two inscribedspheres are of equal size. A cylinder and cone projectedon the…
