Answer:
SSS
Explanation:
Two corresponding sides have 1 mark to show they are congruent.
That is 1 pair of corresponding, congruent sides.
Now we have S.
Two other corresponding sides have 2 marks to show they are congruent.
That is one more pair of corresponding, congruent sides.
Now we have SS.
Finally, segment AC is congruent to itself. AC is a side of both triangles.
That is one more pair of corresponding, congruent sides.
Now we have SSS.
Answer: SSS