Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 150
n point. Construction (Fig. 202). Let Q be the given plane, and asrsume ah to be given; it is required to find a. Through a*draw the //-projection, Mh, of some line in the plane Q. Ingeneral, the simplest construction results when the assumedline is a principal line of the plane ; hence Mh is here…
Geometry, Descriptive
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