Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 253
allel to each other, withtheir angles alternating. Draw the line XY, and 5f below it fix the point a. Drawthe line cd) 6 lono;, and at an ang^le of 45° with V.P. Onah construct the equilateral triangle cd)C. This represents the 232 SOLID GEOMETRY plan of the base. On this base, with alternating… … Fig. 37. projecting one of these pyramids we shall be enabled to completethe solid. On the line he construct two sides of a regular pentagoncH and HE. These represent the lines ch and hf, forming partof the base of the pentagonal pyramid constructed on to theH.P. To find the angle this base forms…
Geometrical drawing
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