Question

use the figure to complete each part.
(a) name the vertex of ∠1.
(b) name the sides of ∠gfe.
and

Explanation:

Part (a)

Step1: Recall vertex definition

The vertex of an angle is the common endpoint of its two sides. For $\angle 1$, the two sides meet at point $F$.

Step1: Identify angle sides

For $\angle GFE$, the angle is formed by rays $FG$ and $FE$ (or $\overrightarrow{FG}$ and $\overrightarrow{FE}$), with the vertex at $F$. So the sides are the two rays forming the angle.

Answer:

$F$

Part (b)