Projective geometry for use in colleges and schools (1911)
Milne, William P. (William Proctor), 1881- · London : Macmillan · leaf 70
ion,the Circular Points at Infinity in tt become points inthe finite part of tt. Hence to generalise by projection, draw the figuregiving to the metrical properties (where possible) theirprojective interpretations as explained in Chap. II. THE CONIC 49 Arts. 6 to 20, and then regard tJte Circidar… … Fig. 24. Generalisation. If O he a point whose Polar Line meets a conicin I and J, and if P he a point on the conic, thetangent at which meets IJ in Z, then will OP and OZharmonically separate Ol and OJ. Example 2. If two circles he concentric, and a chord of onetouch the other, it is hisected at…
Geometry, Projective
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