Question

which segment(s) are perpendicular to ab? segment cd only segments cf, cd, and ce segment cd and segment ce

Explanation:

Step1: Recall the definition of perpendicular lines

Perpendicular lines intersect at a right angle ($90^{\circ}$).

Step2: Analyze the given figure

In the figure, there is a right - angle symbol between segment \(CD\) and segment \(AB\). There are no right - angle symbols between \(CF, CE\) and \(AB\).

Answer:

Segment \(CD\) only.