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 180
(From Diefenbach, Series B. PI. XI.) Fig. I44a. 178. In Fig. 144 the circles X, Y, Z, and W are tangent, as in § 174,Ex. 4. The lines HK, KF, FG, and GH are perpendicular to OA, OB,OC, and OD, respectively, at the points X, Y, Z, and W, respectively.The small circles are tangent as indicated.…
Geometry · Decoration and ornament
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
