Se considera un triunghi abc cu ab=18 cm si punctele m, n apartin (bc) astfel incat [bm] congruent cu [mn] congruent cu [nc].fie e mijlocul lui [ab], f mijlocul lui [ac],{s}= en inclus in am si {t}=mf inclus in an. afla lungimea [st]

Determine whether angle-angle-angle (aaa) is a valid means for establishing triangle congruence. 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.