1 The diagram shows a sector \(O A B\) of a circle with centre \(O\).
\includegraphics[max width=\textwidth, alt={}, center]{f9a7a4dd-f7fd-4135-8872-2c1270d46a14-2_383_472_566_778}
The radius of the circle is 8 m and the angle \(A O B\) is 1.4 radians.
- Find the area of the sector \(O A B\).
- Find the perimeter of the sector \(O A B\).
- The perimeter of the sector \(O A B\) is equal to the circumference of a circle of radius \(x \mathrm {~m}\). Calculate the value of \(x\) to three significant figures.