Given two points on the plane. Bring the line that connects them if the ruler you have is smaller than the distance between those points.
1. I assume that the compasses open more than half of the distance between the points A and B.
2. Draw circles around A and B with the utmost opening of the compasses. These 2 circles have to intersect in 2 points P and Q.
3. The midpoint of PQ is the midpoint of AB too. Can you finish the construction now?