7 In Fig. 7, A and B are points on the circumference of a circle with centre O . Angle \(\mathrm { AOB } = 1.2\) radians.
The arc length AB is 6 cm .
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{15b8f97b-c058-409f-907f-cb0a6102abc4-3_371_723_1048_833}
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\caption{Fig. 7}
\end{figure}
- Calculate the radius of the circle.
- Calculate the length of the chord AB .