Given Data:
The radius of the circle is, r = 4
The angle is, 98.
The measure of angle that an arc makes at the center of the circle of which it is a part. Therefore, the measure of the arc AB is 90.
The length of the arc AB can be calculated as,

The area of the shaded section is equal to the area of the arc, which can be calculated as,

The area of the unshaded region can be calculated by subtracting the area of the arc from the area of the total circle. The area of the total circle is,

Therefore the area of the unshaded region can be calculated as,
