Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 61
Elevation of line ab(6) Fig. 35 … required both in abstract problems and in their practical appli-cations, such as casting shadows. For example, suppose that it is required to find the H traceof ah. Fig. 35 a. If the line is extended beyond h, it is seen tointersect V at vt. From the projections, it can be seen that asah approaches…
Geometry, Descriptive
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