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 88
Fig, 67a. — Mosaic Flooring. EXERCISES 1. Show how Fig. 67 is obtained from Fig. 66. 2. If ^5 = a, find the area of POQZR WX. Ans. -(9-6\/2). 3. li AB = a, find the area of the square BGVF. Ans. ^\3-2v^). 4. Prove that GQOFand RZCK ?ire congruent rhombuses. DESIGNS BASED ON OCTAGONS WITHIN SQUARES… … Fig. 68. 84. In Fig. 68 ABCD isa square, AR = VB = BU,etc., and the points are joinedas indicated.
Geometry · Decoration and ornament
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