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 269
Fig. 230a. — From the Union ParkChurcli, Chicago. In Fig. 230 D is the middle point of AB, A is the center for the arcsCB and ED, B for the arcs AC and DF, and D for the arcs A£ and BF.Circle O is tangent to the arcs as shown. EXERCISES 1. Prove that ED and DF, FB and CB, AE and AC are tangentin…
Geometry · Decoration and ornament
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