A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 34
Draw a line making any angle with AB. DivideAB into as many equal divisions as the polygonhas sides. With A and B as centers and AB as a radius 30 ^^^^^^ 1 /\ \ ^^^^30 k. J Fig. 21 . A- t-r V / / / 1 / 1/ / / L>9 1 t 2\ 3 ^ 5 6 7 7^ Fig. 22 / MFXHANICAL DRAWING 31 describe arcs at C. A line… … Fig. 23 Exercise 24.—Octagon within a circle. Construc-tion : Within a circle of an assumed diameter, dividedinto quadrants, draw bisectors. The circumference isnow divided into eight equal divisions. Determine andlocate the size of the interior angle by the precedingformula. Fig. 23. Exercise…
Mechanical drawing
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