Answer: PS
Step-by-step explanation: The stack A D with a bar on top in Figure ABCD corresponds to line segment AC in Figure PQRS.
In Figure ABCD, the stack A D with a bar on top indicates that segment AD is vertically stacked on top of segment A. In Figure PQRS, line segment AC is the only line that matches this arrangement.
To understand this, let's break it down. In Figure ABCD, each letter represents a point on the line segment. So, A and D are two distinct points on the line segment AD. The bar on top of the stack indicates that segment AD is on top of segment A.
Now, let's turn our attention to Figure PQRS. Each letter represents a point on the line segment. By comparing the arrangement of the line segments in both figures, we can see that line segment AC in Figure PQRS matches the stack A D with a bar on top in Figure ABCD. This means that segment AC in Figure PQRS is vertically stacked, with point A at the bottom and point C on top.
In conclusion, the stack A D with a bar on top in Figure ABCD corresponds to line segment AC in Figure PQRS.