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 313
Fig. 96. Fig. 97. Peoblem 75. From the projections of a line, to find the angles it forms with ea^hplane, and its true length. Pig. 97. Let ah represent the horizontal projection, and ah the verticalprojection. Prom h draw the line hh, and from a draw the line ORTHOGRAPHIC PROJECTION 293 act, both…
Geometrical drawing
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