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 104
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… … FiG. 39&. 4. Draw the perspective of a cube; of a cylinder; of a pyramid;of a hexagonal prism. 5. Draw the perspective of two concentric circles. CHAPTER III. THEORY OF CONICS. § 29. Introduction. The Greeks originally studied conies as plane sections ofcones.^ S.teiner and Chaslcs considered…
Geometry, Projective · Geometry, Analytic
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