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 71
es, .4 and B. CHAPTER IX PROJECTION OF RECTILINEAL ANGLES, AND OF FIGURES AND SOLIDSINVOLVING THE SAME Section 18. Two inclined lines meeting each other at a point above the H.P.may be made to form any angle as they meet, and if, say, two sticks of pencil,to serve for lines, be used experimentally,… … Fig. 64. of the two lines, that is, the plane in which both have place, varies in its attitude,with the variation of the angle formed by the two lines, while the lines may stillremain each at its own particular angle to the H.P. As illustration, let there be two lines A and B. Let A be inclined at,…
Geometry, Descriptive
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