2
The diagram shows a sector \(O A B\) of a circle, centre \(O\) and radius 8 cm . The angle \(A O B\) is \(46 ^ { \circ }\).
- Express \(46 ^ { \circ }\) in radians, correct to 3 significant figures.
- Find the length of the arc \(A B\).
- Find the area of the sector \(O A B\).