Question

determine how the triangles are congruent.
angle-side-angle (asa)
angle-angle-side (aas)
hypotenuse-leg (hl) theorem
side-angle-side (sas)
side-side-side (sss)

Explanation:

Step1: Identify triangle - type

The triangles are right - angled triangles.

Step2: Observe congruent parts

They have a congruent hypotenuse (marked with one cross) and a congruent leg (common side).

Answer:

C. Hypotenuse - Leg (HL) Theorem