Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 38
ts in space, and then connecting each point with the otherthree, thus forming a solid bounded by four triangular faces.In visualizing this pyramid, any one of the four points may betaken as the vertex, and the other three points as the cornersof the base. In Fig. 32, no ground line is shown; hence… … Fig. 27. Fig. 28. Fig. 29.
Geometry, Descriptive
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