Question: change in width of AB?
1. The problem asks for the change in width of segment $AB$.
2. To find the change in width, we need the initial and final widths of $AB$ or a formula relating the width to other variables.
3. If $AB$ is a line segment on a coordinate plane, the width could be the difference in the $x$-coordinates of points $A$ and $B$.
4. The change in width $\Delta w$ is given by $$\Delta w = w_{final} - w_{initial}$$
5. Without specific values or coordinates for $A$ and $B$, we cannot calculate a numeric answer.
6. Please provide the initial and final positions or lengths of $AB$ to proceed with the calculation.