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 172
Fig. 137a. — From St. Marys Church,Speenhamland, Newbury, England. 170- In Fig. 137 EFG is an equilateral triangle inscribed in a circle andX, Y, and Z, are the centers of the semicircles constructed as shown. EX£RCISES 1. If OA = a, find the lengths of OZ, ZH, and GH. Ans. GH = ~{^-V). 2. Prove…
Geometry · Decoration and ornament
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