Projective geometry for use in colleges and schools (1911)
Milne, William P. (William Proctor), 1881- · London : Macmillan · leaf 32
QgR^ andRjP^, R2P1 and P1Q2, P2Q1 ^^^^ collinear. Project the line OU to infinity. Let, as usual, O, U, etc., denote the projections ofO, U, etc. Draw the projected figure directly fromthe enunciation. We thus obtain Fig. 9. It is thus plain that the intersections of QiR.j, QoRjand RiPa, R^Pi, and… … P2 Q2 R2 Fig. 9. Example 2.. We shall require Cevas Theorem to solve thepresent example: CevaS Theorem. If ABC be a triangle and O anypoint, and if the lines joining O to the vertices meet theopposite sides in D, E, F respectively, then FB DC EA ^ If in the Ji<jnre to Cevas Theorem, EF meet BC…
Geometry, Projective
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