Descriptive geometry for students in engineering science and architecture; a carefully graded course of instruction (1915)
Armstrong, Henry F. (Henry Fry), 1868- · New York, J. Wiley & sons, inc.; [etc., etc.] · leaf 24
n of the line to the V.P. is complement to the inclination of the planeto the V.P. If the student will now take a pencil to serve for a line and arrange it per-pendicularly to any oblique plane—the hand may be arranged to show the attitudeof the oblique plane—he will notice that the projection on… … Fig. ic. pendicular to the V.T. of the plane. Illustrations of perpendicular lines to obliqueplanes are shown at (iii) and (iv) in Fig. 10. N.B.—The projections of the line need not cross the traces of the plane. The method of linding the angles of inclination of any oblique plane whosetraces are…
Geometry, Descriptive
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