Question

use the figure to complete each part. (a) name the sides of ∠1. and (b) name the vertex of ∠dba. (c) write two other names for ∠cbd. and

Explanation:

(a) The sides of an angle are the two rays that form the angle. For ∠1, the rays are $\overrightarrow{BA}$ and $\overrightarrow{BC}$.
(b) The vertex of an angle is the common endpoint of the rays that form the angle. For ∠DBA, the vertex is point B.
(c) An angle can be named in different ways. ∠CBD can also be named as ∠2 and ∠DBC.

Answer:

(a) $\overrightarrow{BA}$, $\overrightarrow{BC}$
(b) B
(c) ∠2, ∠DBC