Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 18
, hg, etc., the sides arelaid out. The bottom and top may be joined in the proper 17 position. Care must be taken to place these in such a posi-tion that when folded into place the edges will meet theirrespective sides. Those surfaces must be of the true size andshape. To lay out the surface of a… … riG. /-^ ination of Fig. 19, it will be observed that the triangles areadjacent with a common point at the vertex, one side in com-mon, and that the bases are not in a straight line. Observethat the length of the sides of the triangles is the true lengthof the edges of the pyramid in each case. In…
Projection
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