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 201
YZetc. 4. li AO = r, find the radius of the circle tangent to XY, YZ, etc. Ans. r{2 - V3). 5. li AO = r, find the following areas: (a) The figure ABCYA. Ans. ~ (.5 ir - 6 V3). (b) The small circle with center 0. Ans. Tra^(7 — 4v3). 6. It AO =r, find the area of the three-pointed curved figure ACE.… … Fig. 168. — From Canopy over Portail des Libraires Cathedral, Rouen, France. Porter, Vol. II, p. 266. EXERCISES204. 1. Show how to construct Fig. 168 so that Avd, BZD,CWE, etc. shall be tangent at points A, B, C, etc. 2. Prove that the circle A YZ W can be drawn tangent to A YC,BZD, and CWE. 3. If…
Geometry · Decoration and ornament
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