5.
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{a5a5dd8b-1438-4698-929a-c5e3d5ed0694-10_488_784_310_667}
\captionsetup{labelformat=empty}
\caption{Figure 1}
\end{figure}
Figure 1 shows the plan for a garden.
In the plan
- \(O A\) and \(C D\) are perpendicular to \(O D\)
- \(A B\) is an arc of the circle with centre \(O\) and radius 4 metres
- \(\quad B C\) is parallel to \(O D\)
- \(O D\) is 6 metres, \(O A\) is 4 metres and \(C D\) is 1.5 metres
- Show that angle \(A O B\) is 1.186 radians to 4 significant figures.
- Find the perimeter of the garden, giving your answer in metres to 3 significant figures.
- Find the area of the garden, giving your answer in square metres to 3 significant figures.