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 203
D efenbach, Series B, PI. XXX. 1 Eomussi, PI. XXIV. 190 GOTHIC TRACERY: FORMS IN CIRCLES EXERCISES 207. 1. Show the construction for Fig. 170. Suggestion. — Draw the two diameters AC and BD at right anglesto each other. Connect the points as shown. F, H, etc. are the mid-dle points of AB, BC, etc.… … 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,…
Geometry · Decoration and ornament
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