Transcript text: between $k$ and $m$.
In the diagram, a reflection in line $k$ maps $\overline{G H}$ to $\overline{G^{\prime} H^{\prime}}$. A reflection in line $n$ maps $\overline{G^{\prime} H^{\prime}}$ to $\overline{G^{\prime \prime} H^{\prime \prime}}$. Also, $H B=9$ and $D H^{\prime \prime}=4$.
a. Name any segments congruent to each segment: $\overline{G H}, \overline{H B}$, and $\overline{G A}$.
b. Does $A C=B D$ ? Explain.