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Answer: Yes you can use the HL theorem
Explanation:
HL = hypotenuse leg
The tickmarks tell us about the congruent hypotenuse sides. This takes care of the "H" from "HL".
The "L" portion is because BC = BC (reflexive property) which are the congruent legs.
So we have enough info to use the HL theorem to prove the triangles are congruent.
Note: The HL theorem only works for right triangles.