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 480
at the point of intersection of the planes, andwhich touches any face of the solid. For the circumscribing sphere first obtain the three planes whichbkect at right angles any three edges of the solid. Then determine thesphere which has its centre at the point of intersection of the planes,and… … 361. Problem. — To determine any regular polyhedroninscribed in or circumscribing a given sphere. Let the circle, centre ov be a projection of the givensphere, and let the required figure be a tetrahedron. First work the last problem for a tetrahedron of anyassumed edge, that is, draw Fig. 360.…
