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 169
ure 137a shows two different kinds of trefoils.Many more or less complicated designs have been basedon the simpler ones here given.^ 1 A. Pugln, Illustrations; A. and A. W. Pugin, Illustrations. 2 Womum, p. 106. 8 Billings (3) ; Day, p. 36 ; Brandon (2), PI. 40. 156 GOTHIC TRACERY: FORMS IN CIRCLES… … EXERCISES 1. Show how to construct the figure. Solution.—Circumscribe an equilateral triangle about the circle.Connect each vertex with the center. Inscribe a circle in each of thetriangles FOG, GOE, and EFO. 2. Prove that the small circles are tangent to the large circle andto each other. 3. Prove…
Geometry · Decoration and ornament
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
