Question

If AB = 45 units and M is the midpoint of AB, then AM = ________ units.

• A. 25
• B. 15
• C. 22.5
• D. 24.5

Answer 1

The correct option is C 22.5


Let M be the midpoint of a line segment with length 45 units. Midpoint M divides the line segment into two equal lengths AM and BM.
$\therefore AB=AM+BM=45$
$\therefore AM=\frac{45}{2}=22.5$ units