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 184
c PEQ is a semicircle. 4. Prove that the curved figures AHPE and EQFB are congruent. 5. Prove that tangents to the two semicircles PEQ and QFR attheir common point Q are perpendicular to each other. 6. If AB = a, find the area of the following figures: (a) theqaadriioil EQFR, etc.; (6) the oval… … « A Fig, 148.— Stained-glass Detail. Holy Trinity Church, Evansville, Indiana.EXERCISES 182. 1. Construct Fig. 148. 2. Prove that the crescents AHE and BEF are congruent. I 3. If HE = a, find the area of (1) the quadrifoil HAEBF etc., and(2) the crescent-shaped figure HAE. Ans.(\)?-{1 + ^); (2)^
Geometry · Decoration and ornament
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