American text books of art education : Geometrical drawing (1873)
Smith, Walter, 1836-1886 · Boston : James R. Osgood & Co. · leaf 80
below the line. Bisect the part 3 2 of the line 1 2,and describe a semicircle below the line, and then describe a similarone on 1 o above the line. With 3 and 5 as centres, and 3 1 asradius, describe semicircles above and below the line 1 2, respectively. Prob. 81.— To construct any requ/ar figure,… … 6. Divide the arc 6 B into six equal parts. 6 is the centre, and6 A the radius of a circle, in which a hexagon may be described onA B. For a pentagon, mark off the distance 6 o on the perpendicu-lar in 5, and with o as centre, 6 A as radius, describe the circum-scribing circle. For a nonagon, mark…
Geometrical drawing
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