Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 107
Fig. 89, it will be seen that the line of intersection of the auxiliaryplane Y, with the given plane Z (ed), contains the requiredtrace, i, of lA on Z. VI, § 78] POINTS, LINES, AND PLANES 89
Geometry, Descriptive
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