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 18
Fig. 6. Fig. 60. 8. Irregnilar pentagons.—in Figs. 6 and 6a ABCD represents a six-inchsquare. E, F, G, and H are the middle points of the sides. In Fig. 6 K, L, R,and S are the middle points of the sides of the square EBFO. In both figuresthe points are joined as indicated to form the irregular…
Geometry · Decoration and ornament
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