Question

Does anyone know this?

Answer 1

Each mark determines if the sides is congruent...since Triangle A has 3 marks the same that would mean that all the sides are the same.....If we look at Triangle B we see all the marks are the same just like Triangle A......If we look at Triangle C we see that we have 3 different kinds of marks that are not alike to the others....so the two congruent ones would be Triangle A and B....

We determine this by knowing if the sides were equal to each other so since we determined they were equal by their sides that would mean we determined it by SSS....