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 322
th its sides PL and !PM drawn from a point in \DC extended and tangent \to the sides of the arch at ^-^L and M, respectively. ^^~ -- Fig. 277.EXERCISES 1. Show how to construct the gable over a given Gothic arch, ifpoint P is given. 2. Prove that PL = PM. 3. Prove that /. OPL = Z. OPMyvheu (a) AB,…
Geometry · Decoration and ornament
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
