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 179
Fig. 143, — Rose Window, Strassengal,Germany. Fig. i43a. — Stamped Steel CeilingDesign. 3. Prove that line OE bisects /.GO A. Suggestion. — Draw O//the bisector of /.GOA. Prove that «)0 = Ox;OH is the perpendicular bisector of xw; Ew = Ex. Therefore, Elies on OH. 4. If OA = a, find the area of (1)…
Geometry · Decoration and ornament
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