Abstract
It is time to launch into a discussion of congruence for triangles. This turns out to be not as trivial as one might suppose. The standard conventions are somewhat misleading. There are many comments to make about the next two definitions.
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© 1975 Springer-Verlag New York, Inc.
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Martin, G.E. (1975). Congruence and the Penultimate Postulate. In: The Foundations of Geometry and the Non-Euclidean Plane. Undergraduate Texts in Mathematics. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-5725-7_17
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DOI: https://doi.org/10.1007/978-1-4612-5725-7_17
Publisher Name: Springer, New York, NY
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