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 117
hown inFigs. 94 and 95 is the basis of a large number of fanvaulting designs besides those here mentioned. See alsoFigs. 145 and 146. This type of vaulting is peculiar tothe late English or Perpendicular Gothic architecture.The name refers to the manner in which the main ribs ra-diate from the tops… … 1 Fletcher, p. 288-290; Bond, chapter xxii; Fergusson, Vol. II, p. 361. DESIGNS FORMES FROM ARCS OF CIRCLES 105 EXERCISES 1. Prove that the sectors HAE, EBF, etc., are congruent. 2. Show how to construct (1) circle X inscribed in the sectorHAE, and (2) circle 0 inscribed in the curved figure EFGH.…
Geometry · Decoration and ornament
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