Trong không gian vector R mũ 3 cho hai hệ vector: U= { u1=(m-2,2,50; u2=(2,1,3); u3 =(3,1,3)} V= {v1 = (m-1,2,1); v2=(m, 2,1); v3=(-1,7,4)} Chứng tỏ U, V là hai cơ sở của R3

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.