# Congruence Classes of Geoboard Triangles

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

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

## Snapshots

## Details

Reference

[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.

## Permanent Citation