An introduction to projective geometry and its applications; an analytic and synthetic treatment (1905)
Emch, Arnold, b. 1871 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 271
DCchoose a pivot E in such a manner that DE:DO=DO:DC, sothat the triangles OCD and EOD are similar. Then with OD 1 See Geometrische Transformationen by Dr. K. Doehlemann, pp. 199-204,Leipzig, 1902. 2 The Industrialist, Vol. XXV, pp. 237-240, Manhattan, Kansas, 1899. 3 Comptes Rendus, Vol. CXXXI, p.… … Fig. 113. counter-parallelograms OBCD and ODEF are similar, and asa BOD = A DCB, it also follows that a DOF = A FED. By meansof this reversor it is possible to keep two links BO and FO atequal angles from a given link DO. By a similar constructiontwo other links, BO and i^O, symmetrical to DO may…
Geometry, Projective · Geometry, Analytic
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