Answer:
So to prove you need 1 pair of congruent corresponding legs, Both triangles are right triangles , and The hypotenuse of both triangles are congruent
or 1,2, and 3
Explanation:
Both triangles are right triangles is needed because otherwise the theorem won't work.
The hypotenuse of bothe triangles most be congruent or nothing would be congruent.
1 pair of congruent corresponding legs because you need the large or small legs to be congruent in order to have the whole triangle to be congruent.