i need help with this plss

Answer:
2.4 cm.
Step-by-step explanation:
1. Find Midpoint of segment AB which is 10/2 = 5.
2. Find Midpoint of segment BC which is 5.2/2 = 2.6.
3. Subtract both midpoints 5 - 2.6 = 2.4.
That's pretty much it, Hope it helps!