Determine whether side-angle-angle (saa) is a valid means for establishing triangle congruence. in this case, you know the measure of a side, an adjacent angle, and the angle opposite to the side. if it is a valid criterion, explain why. if it is not valid, use geogebra to create a counterexample demonstrating that it doesn’t work and give an explanation. if you construct a counterexample, take a screenshot of your work, save it, and insert the image in the space below.