Question

select the step that is part of the construction. fold the paper in half horizontally fold the paper so that b is on the midpoint of ab fold the paper so that b is on top of a fold the paper in half vertically

Explanation:

To find the mid - point of a line segment $\overline{AB}$ using paper - folding, we fold the paper so that one endpoint (B) lies on the other endpoint (A). This action effectively divides the line segment into two equal parts, which is the concept of finding the mid - point.

Answer:

Fold the paper so that B is on the midpoint of $\overline{AB}$