Answer:
26 cm
Explanation:
Given that: AB = 12 cm, BC = 20 cm.
Therefore, AC = 32 cm
Let the midpoint of the line segment AB be represented by D.
The midpoint of the line segment AB =

= 6 cm
This shows that AD = DB = 6 cm
So that,
the distance between C and the midpoint of the line segment AB = DB + BC
= 6 + 20
= 26 cm
The distance required is 26 cm.