Geometry

The answer is A. 22.

 

1. Recall the property of congruent line segments:

If , then by the definition of congruent line segments, the length of  is equal to the length of , that is .

 

Also, note that the order of endpoints of a line segment does not affect its length, so  and  represent the same line segment, and .

 

The fact that  is irrelevant to finding the length of  since we are interested in the relationship between  and