Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 492
cle. Thesecircles are the projections of thecircumscribing sphere. 2. Bisect one of the sides, hi forinstance, in the point /. With bas centre, and radius bj, draw an arc till it meets dh produced ini. Draw the projector ii, and join ib. Bisect the angle big by a line cutting the axis in c. Withc… … Fig. 268. 472 SOLID GEOMETRY chap. Problem 219, 1. To inscribe a given tetrahedron in a sphere. 2. To inscribe a sphere in a given tetrahedron. Tig. 269. The construction of this problem is the same as the one pre- l .4-
Geometrical drawing
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