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 235
Fig. 200o.— From St, Annes R. C.Church, Chicago. 243. Figure 200 shows a stilted equilateral arch EOF with the inscribedcircle. A ABC is equilateral. Points A and B are the centers for the arcs BCand AC, respectively. Lines AE and BF are equal straight lines perpendiculartoAB. EXERCISES 1. Show how…
Geometry · Decoration and ornament
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