Question

use the figure to complete each part.
(a) name the vertex of $angle sqt$.
(b) write two other names for $angle rqs$.
(c) name the sides of $angle 1$.

Explanation:

(a) The vertex of an angle is the common endpoint of its two sides. For ∠SQT, the common endpoint is Q.
(b) ∠RQS can be named by its numbered angle, or by reversing the order of the non-vertex points (as long as the vertex is in the middle).
(c) The sides of ∠1 are the two rays that form the angle, which share the vertex Q.

Answer:

(a) Q
(b) ∠2 and ∠SQR
(c) $\overrightarrow{QT}$ and $\overrightarrow{QR}$