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 181
tained withinthe five small circles 0, F, G, H, and Kt Ans. About 15 %. 168 GOTHIC TRACERY: FORMS IN CIRCLES 8. What per cent of the area of the large circle is contained withinthe four circles X, Y, Z, and W ? Ans. 68.62 %. 9. Give the construction for Fig. 144a. 179. In Fig. 145ABCD is a… … A E Fig. 145. — Fan Vaulting from Gloucester Cathedral,Fletcher, PI. 112. B England. EXERCISES 1. Lines are drawn tangent to the arcs at the points where theycut the diagonals of the squares AEFD and EBCF. Prove that thesetangents form the squares WXYZ and KLMN. 3. Show how to construct the entire…
Geometry · Decoration and ornament
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