Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 125
in the caseof a pyramid), or a point on the top face (in the case of a prism)(§ 30). These points are then connected with the base pre-viously determined. 108 DESCRIPTIVE GEOMETRY [VI, § 97 In Fig. 109, let the plane X be given, and let it be requiredto construct the projections of an equilateral… … Fig. 109 shape of the base {cb^d) is arranged in the desired position,and then counter-rabatted upon X {^ 96). Next, one of the vertices, 6, is selected, and the projectionsof a line of indefinite length perpendicular to X are drawnthrough the projections of the point, to represent one of theedges…
Geometry, Descriptive
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