Question

which triangle congruence theorem could you use to prove the following triangles congruent?

Explanation:

Step1: Identify triangle type

These are right - angled triangles.

Step2: Check congruence criteria

In right - angled triangles, if the hypotenuse (marked with one cross) and one leg (marked with two crosses) are equal, the HL (Hypotenuse - Leg) congruence theorem applies.

Answer:

HL (Hypotenuse - Leg)