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 129
circumscribedabout a conic with the points of tangency KLMN, Fig. 47. Thepairs of sides AB and CD, BC and AD, CA and ED intersecteach other in the three points OPQ. The pole of AC is thepoint of intersection of KN and LM and is the point of con-currence of PO, ML, DB, NK. Similarly, KL, AC, NM… … Fig. 47- THEORY OF CONICS. 117 at random on NL, by which the fourth side CD and its pointof contact is perfectly determined. From this the propositionfollows: Let PAB be a triangle circumscribed to a conic, and LN thechord 0) contact of the tangents PB and PA; then the lines join-ing any point Q on…
Geometry, Projective · Geometry, Analytic
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
