Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 92
nly.For this reason it is necessary to employ an auxiliary line.The line, having both projections and traces, can be used toestablish relations between the point and the plane. It is sufficient, then,- to assume any line in the plane (§ 64).Any point on such a line will lie in the given plane. For… … FiQ. 77 these points draw any two lines that intersect on B.A {XX^and XX). These lines will be the traces of some plane 76 DESCRIPTIVE GEOMETRY [VI, § 6b passing through ab. An infinite number of such planes canbe drawn. 67. To Pass a Plane through a Given Point. Pass an auxil-iary line through the…
Geometry, Descriptive
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