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Congruence Classes of Geoboard Triangles

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This Demonstration displays all the congruence classes of triangles on an geoboard. For example, on a geoboard, there are 79 congruence classes.

Contributed by: Helmut Knaust (March 2016)
Open content licensed under CC BY-NC-SA

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[1] M. S. Meagher, M. T. Edwards, and S. A. Özgün-Koca, "What's Your Answer? Searching for Triangles," Mathematics Teacher, 109(7), 2016 pp. 500–506. www.jstor.org/stable/10.5951/mathteacher.109.7.0500.

[2] D. J. Rusin. "A028419: Congruence Classes of Triangles Which Can Be Drawn Using Lattice Points in Grid as Vertices." The Online Encyclopedia of Integer Sequences (N. J. A. Sloane, ed.). (Mar 10, 2016) oeis.org/A028419.

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