Question

which segment is adjacent to $\angle z$?
triangle with vertices z, k, m, right angle at k
answer
$\overline{kz}$ $\overline{mk}$ $\overline{mz}$

Explanation:

An adjacent segment to an angle is a side that forms the angle. ∠Z is at vertex Z, so the segments forming ∠Z are ZK and ZM. Among the options, ZK (written as $\overline{KZ}$ here) is present.

Answer:

A. $\overline{KZ}$