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 288
O. 6 Suggestion. — It is necessary to prove that OX = OY = OZ = OW,and that circle 0 is tangent to the four arcs A C, BC, ES, and FR. 6. Show that the radius of circle 0 may be obtained from theformula found in § 289, Ex. 2. 7. Ji AB = s, find the length of the line OD, the altitude of thearch AES,…
Geometry · Decoration and ornament
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