Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 94
e noticed that the lines must VI, § 68] POINTS, LINES, AND PLANES 77 intersect in order to determine a plane (§ 33). The given linesintersect at e. The traces of the given lines will lie in the required traces ofthe planes (§ 60) ; therefore if the traces of ab (n and q) and ofcd (m and p) are… … IsoMETKio Projection Cobkespondinq to Fio. 78FiQ. 79 Figure 79 shows the space figure that corresponds to Fig. 78,in isometric projection. Sometimes it may be inconvenient or impossible to find allfour traces of the given lines. In this event, determine twotraces on either H or V; draw the trace of…
Geometry, Descriptive
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