2-metric Axioms for Plane Euclidean Geom
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Patrick Cassens; B. A. Cassens
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Article
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1971
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John Wiley and Sons
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English
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If B(a, b, c), then -B ( a , c, b). A 8. If points a, b and c are collinear and distinct, then at least one of B ( a , b, c), B ( b , c, a) or B(c, a, b) is true. In view of T 2.2, T 2.3, and T 2.4 exactly one of B ( a , b, c), B ( b , c, a ) , B ( c , a , b) is true. T2.5. If B ( a , b, d ) and B