Smart, Edward Howard · London : Macmillian and Co. · leaf 42
, and let theresult be X, and so on. 14 PROJECTIVE GEOMETRY The figures X, X, X, X, etc., arc said to be projectivewith one another. Two figures are thus said to be projective when one can beobtained from the other by a finite number of projections. s:j 7. Any three Collinear Points are Projective… … Fig. 5. Let the plane through V and the line ABC be cut by anyplane through ABC in the line ABC, and let B, C be thepoints where VB, VC cut the common section of the planes. Let BB, CC, which are in the latter plane, cut oneanother in V, Then A, B, C project from V respectively into ABC, andthose…
Geometry, Projective
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