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
Fig. 195a. —Stairway, Rouen Cathedral. 237. In Fig. 19S ABCD is a square with diagonals AC and BD, andthe diameters EG and HF. The circle MNPQ is inscribed in the squareOFCG. The arcs GH and FE are quadrants with O as center, and OH asradius. The arc HLM is tangent to line AD at H, and to the…
Geometry · Decoration and ornament
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