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 125
Fig. 101. —From Canterbury Cathedral. Parker (1), p. 161. 125. Figure 101 is based on a network of equilateral triangles. The ver-tices of the triangles are the centers and the line AB the radius for the arcsdrawn as shown. … .Fig. 102.— Arabic Pattern. Bourgoin (I), PI. I. 126. The construction for Fig. 102 is similar to that for Fig. 101. DESIGNS FORMED FROM ARCS OF CIRCLES 113EXERCISES 1. In Fig. 101, prove that the curved triangles ABC, CUD, etc.are congruent. Also BCDE etc. and DHML etc. 2. If AB = 6, find the area…
Geometry · Decoration and ornament
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