Question

what is the answer to this;

Alvan said that if 2 triangles are not congruent, then at least one of the 3 sides of one triangle is not congruent to the corresponding side of the other triangle. do you agree with alvan? justify your answer.

Answer 1

True, it only needs to have one side not corresponding for non-congruent triangles. It can have one, two, or all three sides not congruent.