Lange, David C. (David Christoph) · New York, John Wiley & sons, inc.; [etc., etc.] · leaf 31
c) VP I vo A. A \ ^\ HO Fig. 36 18 PEINCIPLEvS OF DESCRIPTIVE GEOiMETRY … POINTS, LINES AND PLANES 19 tile Plane, so also must the line of intersection be perpen-dicular. The V and H Projections, therefore, of this lineare the projections of the line of intersection of the twoplanes parallel to the GL. 28. To find where a line pierces a plane. Let P be the given Plane…
Shades and shadows · Geometry, Descriptive
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