Answer:
AM = 13 (Option B)
Explanations:
AB = 26
Note:
AM + MB = AB...............(1)
Since Point M is the midpoint of the line segment AB
MB = AM .........................(2)
Substitute equation (2) into equation (1)
AM + AM = AB
2AM = AB
AM = AB / 2
AM = 26/2
AM = 13