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 222
Fig. 186. — From Leighton, PI. 39. EXERCISES 227. 1. Show the construction for Fig. 186. Suggestion. — E, D, and F are the middle points of the sides of theequilateral triangle ABC. Arc HN has a radius equal to BD andhas its center on line ED extended. 2. If the radius of the circle is r, find the…
Geometry · Decoration and ornament
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