Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 160
146 GEOMETRICAL DRAWING AND DESIGN. Octagonal Pyramids. 197. To project a re^lar octagonal pyramid, 8 high, with eachside of its base 2h wide, standing on its base on the H.P., with anedge of its base parallel to the V.P. and 2^ from it. Scale jV fullsize. Fig. 264 A. Draw XY, and 2h below it draw… … Carry up projectors from the points d, e^f^g perpendicular toXY. Fix the point c immediately above r, and 8 aboveXY. Join the point c to d^ e\f\ and g\ which completes thepyramid. 198. To project the same solid lying with one face on the H.P., butwith its axis in a plane parallel to the v. P. Scale…
Geometrical drawing · Design · Drawing
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