Projective geometry for use in colleges and schools (1911)
Milne, William P. (William Proctor), 1881- · London : Macmillan · leaf 72
Fig. 26. Generalisation. If A he a fixed point on a conic, I and J tivo otherfixed points, and if AP, AQ he two variable chords such THE CONIC 61 that A[PIQJ] is constant, then will PQ envelope a conictouching the original conic at I and J. Example 4. If P he a 2^oint on the directrix to a… … Fig. 27. Generalisation. If a conic be inscribed to the triangle SI J, and if Pbe a point on the Polar Line of S, then the tangentsfrom P to the conic harmonically separate PI a7id PJ. 26. It will not be found most convenient in all casesto project the given fig-ure so that the conic in-volved…
Geometry, Projective
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