Projective geometry for use in colleges and schools (1911)
Milne, William P. (William Proctor), 1881- · London : Macmillan · leaf 151
ular chordsof this Rectangular Hyper-bola, and since the anglebetween two chords of aRectangular Hyperbola isequal or supplementary to the angle between theirconjugate diameters, therefore OW is perpendicularto OF. Hence O describes the circle on WF as diameterwhich circle plainly passes through N,… … GENERAL PROPERTIES OF CONICS 131 (1) The three vertices of the Harmonic Triangle ofthe given four points PQRS. (2) The Harmonic Conjugate of the point in whichPQ cuts p, with respect to P and Q, and the other fivepoints similarly determined. (3) The two points on p in which this line istouched by…
Geometry, Projective
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