Answer:
The length of JM is 23 centimeters.
Explanation:
It is given that Line JK bisects line LM at point J. It means J is the midpoint of line LM.
A midpoint divides a line in two equal parts.
J is midpoint of LM, so we can say that the distance between L ans J, J and M are same.

It is given that LJ=23 centimeters. Substitute LJ=23 in the above equation to find the value of JM.

Interchanging the sides, we get

Therefore the length of JM is 23 centimeters.