6.
\includegraphics[max width=\textwidth, alt={}, center]{571780c2-945b-4636-b7c3-0bd558d28710-07_458_809_258_569}
\section*{Figure 1}
Figure 1 shows the sector \(O A B\) of a circle with centre \(O\), radius 9 cm and angle 0.7 radians.
- Find the length of the arc \(A B\).
- Find the area of the sector \(O A B\).
The line \(A C\) shown in Figure 1 is perpendicular to \(O A\), and \(O B C\) is a straight line.
- Find the length of \(A C\), giving your answer to 2 decimal places.
The region \(H\) is bounded by the arc \(A B\) and the lines \(A C\) and \(C B\).
- Find the area of \(H\), giving your answer to 2 decimal places.
\section*{LU}