To find the length of the arc AB, we can use the following equation:

where a is the exterior angle, y is the arc furthest from the angle, and x is the arc nearest to the angle.
We know the value of a, but now x or y. However, we do know that x = 360 - y. We can use this information to find x (arc AB):



y = 230
If y = 230, then AB = 360 - 230:
360 - 230 = 130
The correct answer is 130.