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 151
subdivided into ten secondary divisions, each of which repre-sents one degree. Only one of these is divided in the figure. K 130 PRACTICAL PLANE GEOMETRY Problem 165. To construct a scale of chords. A scale of chords is constructed in the following manner(Fig. 256). Draw the lines AC and CD… … of the primary divisions as radii, draw arcs cutting the chordAD, which will form the scale of chords. To use this scale in setting off an angle—for example, todraw a line that will make an angle of 40° with line CB (Fig. 256). With C as centre, and radius equal to AGO on the scale ofchords, draw…
Geometrical drawing
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