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 230
arc HXZK wouldbe tangent to EF. 5. Is it possible by the methods of elementary algebra and geometryto find the area of the inner trefoil? Remark. — This figure often occurs without the inclosing curvedtriangle ABC. F0BM8 BASED ON EQUILATERAL TRIANGLES 217 236. In Fig. 194 ABC is an equi-lateral… … Fig, 194. D B -From Hanstein, PI. 32. EXERCISES 1. Prove that (1) HKL is an equilateral triangle, and (2) BE isthe perpendicular bisector of HK. 2. Prove that the arcs that form tte cusps are tangent at pointsR and S, the middle points of the lines HK and HL. 3. Prove that the circle inscribed in A…
Geometry · Decoration and ornament
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