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 103
. This idea will be fully discussed in the next chapter. 90 PROJECTIVE GEOMETRY. § 28. Exercises and Problems. 1. Given two straight lines and a point; to draw a straightline through this point passing through the inaccessible point ofintersection of the given lines. Solution.—Let g and h be the… … Fig. 39a. PQRS may be considered as the perspective of a square havingM, N, A as diagonal points. Hence any third line through Mcutting g and h at T and V is the perspective of a line parallel toQR and PS. From this it follows that the line joining A to thepoint of intersection B of TR and QV is…
Geometry, Projective · Geometry, Analytic
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