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 204
208. In Fig. 171 the s-pointed f-^ star AMBNC, etc., is constructed in agiven circle. Points X, Xi, Xj, etc. are centers for EQTMA, ARTWB, etc. OTHER FOILED FIGURES 191 EXERCISES 1. In the T^ij star shown in Fig. 171 prove that(n) EF, BK, and GD are parallel. (6) EQ = QO=OR = RE = EL, (c) DL, A K,… … Fig. \l\a. — From First Congregational Cliurch, Chicago. 3. Prove that the points A, Z, T, 0, T, P, and H are coUinear.Suggestion. — This and many other properties of collinearity follow from the theorem : If on a circle AB = BC and if A and C are onopposite sides of a diameter through B, then…
Geometry · Decoration and ornament
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