Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 71
lane containing A and perpendicularto g (Fig. 117). 60 DESCRIPTIVE GEOMETRY 235. If a line and a. plane are perpendicular, their angles of inclina-tion with H are compleriientary, likewise their angles of inclina-tion with V. Check this by finding the projections of a line making30° with H and 45°… … Fig. 119. 237. Show the projections of the line passing through c and perpen-dicular to plane AB (Fig. 119). 238. Find the traces of the plane passing through a, parallel to Aand perpendicular to 2 (Figs. 118 and 119).
Geometry, Descriptive
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