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 264
) or about —.8^ ^ 40 6. Construct circle 0.Suggestion. —See § 2.o3 and § 332. 7. If the radius of CE and DE is Jcs and DB = hs, find the radiusof circle 0 ■when AB = s. , s /l + 2h^-2h~ 2k\ Ans. - [ —■ . 2\ 2h-2k- 1 / 8. Show how the formula obtained in Ex. 3 may be derived fromthat obtained in Ex.… … Fig. 228a.— From St, Pol de Leon, Franpe. 273- In Fig. 228 the diameter of the semicircle AFB is the span of theequilateral arch ACB. CD is the perpendicular bisector of AB. The circle Ois tangent to the semicircle and to the arcs as indicated. EXERCISES 1. Prove that the points B, O, and Z are…
Geometry · Decoration and ornament
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