Question

point o is between points m and n on line segment mn. o is the midpoint of line segment mn if _____. on = nm on = om om = nm on + om = mn

Explanation:

Step1: Recall mid - point definition

The mid - point of a line segment divides the segment into two equal parts.
If O is the mid - point of line segment MN and O is between M and N, then the distance from M to O (OM) is equal to the distance from O to N (ON).

Answer:

ON = OM