Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 19
ugh6. (See true length of line, Fig. 15). Since all the edges in this right pyramid are equal, the arc2,-2, is drawn with 0 as center and 0-2, as radius. With thechord 1-2 equal to one side of the base, set off the distances2i-1i, 1i-4i, 4i-3i and 3i-2i. Set off the distance O-S, on the line0-2, in… … 3--f CURVED SURFACES A surface may be generated, or produced by moving aline. If the moving line be made to meet certain conditionsor follow certain lines, definite surfaces may be generated. v/ / /A*/ / / / / /.^/ if / />/ / / / w / /<// / / / ^/ / / / / / / FIG. 21 A straight line moving so…
Projection
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