Question

select all the angles for which $overrightarrow{ha}$ and $overrightarrow{he}$ are the sides.

Explanation:

Step1: Recall angle - naming convention

An angle is formed by two rays with a common endpoint. Here the rays are $\overrightarrow{HA}$ and $\overrightarrow{HE}$ and the common endpoint is $H$.

Step2: Identify the angles

The angles with sides $\overrightarrow{HA}$ and $\overrightarrow{HE}$ are $\angle AHE$ and $\angle EHA$. In terms of the numbered angles, $\angle 8$ is the same as $\angle AHE$ and $\angle 6$ is the non - reflex angle formed by the two rays.

Answer:

$\angle 6$, $\angle 8$