∆abc and ∆def satisfy the aaa correspondence. ∆abc and ∆ not a criterion for congruency of any two triangles.
∆abc and ∆def :
a) are always congruent.
b) are always noncongruent.
c)may or may not be congruent.

a) sas
b) sss
c) asa
d) aaa is not a criterion for congruency of any two triangles.

Triangles ABC and DEF may or may not be congruent, because the angle-angle-angle (AAA) postulate is not a criterion for congruency of any two triangles. This is because the angle-angle-angle postulate only incorporates the angles of the triangles, and the side lengths are not specified, so congruency may or may not be true for these triangles.