Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 35
18 ESSENTIALS OF DRAFTING To construct a Regular Octagon (Fig. 40). — Given the square1-2-3-4. With the corners of the square as centers, and a radiusequal to one half the diagonal, draw arcs cutting the sides of thesquare. Join the points thus found, completing the requiredoctagon. An octagon may… … Fig.^2
Mechanical drawing
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