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 299
Fig. 255a. — From Union Congre-gational Church, Boston, Mass. 301. In Fig. 255 D is the middle point of AB. AH = BK^§ofAB. A isthe center for the arcs EH and CB, B for the arcs EF and CA, H and K for thearcs £A and FB, respectively. EXERCISES 1. Prove that arcs CA and AE are tangent; also FB and…
Geometry · Decoration and ornament
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