Question

look at this angle: what is the vertex?

Explanation:

Step1: Recall vertex definition

The vertex of an angle is the point where the two rays meet.

Step2: Identify the meeting - point

In the given angle formed by rays $\overrightarrow{ST}$ and $\overrightarrow{TU}$, the point $T$ is where the two rays meet.

Answer:

$T$