Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 71
c^ and the point in which HQ intersectsthe ground line GlLi. 71. Projections of Solids. A secondary projection of a solidis obtained by extending the method used for points and lines.As an illustration, the irregular triangular pyramid of Fig. 32is shown in Fig. 93 projected on a secondary vertical…
Geometry, Descriptive
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