The Correspondence of Betweenness of Points and Rays

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In this video, we establish a correspondence between the betweenness relation of collinear points on a line and the betweenness relation of concurrent rays in the plane in an ordered geometry.

This is part 13 (2/3) of the lecture series offered by Dr. Andrew Misseldine for the course Math 3130 - Modern Geometries at Southern Utah University. A transcript of this lecture can be found at Dr. Misseldine's website or through his Google Drive at:

This lecture is loosely based upon Section 2.4 of Euclidean and Non-Euclidean Geometries by Greenberg. Please post any questions you might have below in the comment field and Dr. Misseldine (or other commenters) can answer them for you. Please also subscribe for further updates.