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 186
Fig. 150a. —Steel Coiling Design. Fig, 150. 3. Prove that the arc PKQ is a semicircle. 4. Prove that PQRS is a square. 5. Morris in Practical Plane and Solid Geometry gives the follow-ing construction; On HE construct a semicircle. Draw ML, aradius perpendicular to AB. Draw LO meeting AB at N.…
Geometry · Decoration and ornament
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