Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 191
9. A Prism or Pyramid Whose Axis Is Inclined to Both Hand V. The method of obtaining the projections may best beshown by considering concrete examples. Example 1. Draw the projections of a right pyramid. Tlie axis is 1| long, makes 45° with H and 30° with V, andslopes (from the apex of the pyramid)… … Scale HaJf Size Fig. 252. Construction (Fig. 252). The first step in the constructionis to find the plane which contains the base of the pyramid.The data for this plane are not given directly in the statementof the problem. But, since the plane of the base of thepyramid is perpendicular to its…
Geometry, Descriptive
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