Geometry

Question Analysis:
This question involves overlapping right triangles and the Hypotenuse-Leg (HL) congruence theorem.
The main focus is on the conditions under which HL can be applied.

Key Concept Explanation:
HL is a valid triangle congruence method for right triangles where the hypotenuse and one leg are congruent.

Step-by-Step Solution:
Given: right triangles with shared leg and congruent hypotenuses.
HL requires a right angle, hypotenuse, and one leg to be congruent.
All three are present, so the t...