Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 180
and 0/ theH.T. of C. We will now proceed with planes that are inclined to bothplanes of projection : they are called oblique planes. Let us take 166 GEOMETRICAL DRAWING AND DESIGN. a 60° set square and place it so as to fit closely against bothplanes, as shown at A (Fig. 298). ca will be the H.T.… … Fig. 298. The line ca (Fig. 298) is the H.T. of the plane A, and ab isa line in the plane A, and af a hne in the H.P., both perpen-dicular to the H.T.; therefore baf is the angle A forms withthe H.P. 218. To determine the traces of a plane inclined at an angle of 45° to the H.P., and at an angle of…
Geometrical drawing · Design · Drawing
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