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 175
theprojectivity. We postulate now that a problem is geometricallysolvable if it can be solved by compass and ruler. Hence, replac-ing K by a circle, we can now solve the following problems: … Fig. 68. 2. Given five points oj a conic; to construct the intersections0} this conic with a straight line. In Fig. 68 let AJBJOJ)^ be the given points and I thegiven line. Join Dt and Ex with A1B1C1 and designate the THEORY OF CONICS. 163 corresponding intersections on / by ABC and AWC. Drawan…
Geometry, Projective · Geometry, Analytic
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