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 268
Kr. 54. of, y, c (Fig. 53) by the sides of the triangle, and are the angleswhich the planes of the sides form with one another. Theymay be measured by the tangents, as at TAT (Fig. 54),or by the arc BC cut off by the sides when produced to bequadrants. As we can project great circles at any…
Geometrical drawing
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