Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 161
point from HQ. An analogous statement applies to the revolution of a pointabout VQ into V. 139 140 DESCRIPTIVE GEOMETRY [XV, § 138 Construction (Fig. 217). Let a, lying in the plane Q, be thegiven point, and let it be required to revolve a about HQ intoH Erom ah draw the line aheh perpendicular to…
Geometry, Descriptive
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