Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 107
etween a line (shownonly by its projections) and aplane (shown only by its traces)is encountered again (§ 60). InFig. 89, it can be seen merely byvisualization that the plane Z andthe line ab are not parallel. Hencethey must intersect. But the pointof intersection (the trace oiahaaZ)cannot be…
Geometry, Descriptive
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