A if AB is a segment in the plane and CD is a segment on the plane of the same length, then AB is congruent to CD Do you believe the claim is true? When explaining your thinking , if you believe the claim is true, then try to prove it by using the definition of congruent . If you believe the claim is false , then try to provide a counterexample in which the " " part (hypothesis ) is true , but the "then " part ( conclusion ) is false , you have disproved the claim .