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About collinear points, total points line issue multiple certificates law
Student :Jia Juan Tutor: Yang Hui
Abstract: In elementary geometry, we often encounter the point collinear line of point problem in this regard. The basic invariant projective geometry is a combination of points and lines, so point collinear line is one of the main points of the study of projective geometry. For point collinear line of point solutions, there are many problems, this paper mainly discussed is the use of projective geometry and elementary geometric methods to solve such problems, found by comparing the specific problems which method is more appropriate, as well as problem-solving time issues that need attention. Keywords：Projective transformation; Desargues theorem; complete quadrangle ; Ceva theorem
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