In this unit, you learned about three acceptable criteria for identifying congruent triangles: angle-side-angle (ASA), side-angle-side (SAS), and side-side-side (SSS). Let’s examine some criteria other than these combinations and determine why they do or do not work as a means for establishing triangle congruence. To show that a criterion does not work, you must find a counterexample in which the criterion fails; that is, two or more noncongruent triangles can be constructed with the given measurements. You will create any counterexamples using the GeoGebra geometry tool. If you need help, follow these instructions for using GeoGebra.