A source book of problems for geometry, based upon industrial design and architectural ornament (1912)
Sykes, Mabel, 1868-, Slaught, H. E. (Herbert Ellsworth), 1861-1937, Lennes, N. J. (Nels Johann), 1874- · Boston, Allyn and Bacon · leaf 222
210 GOTHIC TBACERY: POINTED FORMS EXERCISES 228. 1. Give construction for the design shown in Fig. 187. Suggestion.— Construct the equilateral A ABC. Divide each sideinto three equal parts and join the points as indicated. The inter-sections are the centers and ^Af is the radius for the arcs drawn…
Geometry · Decoration and ornament
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