5
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{aded99ef-873e-42fb-ade5-f6f385e7e549-2_510_652_1471_708}
\captionsetup{labelformat=empty}
\caption{Fig. 5}
\end{figure}
Fig. 5 shows triangle ABC , where angle \(\mathrm { ABC } = 72 ^ { \circ } , \mathrm { AB } = 5.9 \mathrm {~cm}\) and \(\mathrm { BC } = 8.5 \mathrm {~cm}\). Calculate the length of AC.