What is the length of A. 7 B. 4 C. 8 OD. 1 3 X +3 ? What is the length of A. 7 B. 4 C. 8 OD . 1 3 X +3 ?

Answer: 4
Step-by-step explanation:
Sides opposite congruent angles in a triangle are congruent, so:
So, MN = 1 + 3 = 4