The exterior angle of the polygon is (a)
Which angle is an exterior angle?
From the question, we have the following parameters that can be used in our computation:
The polygon
By definition:
An exterior angle is an angle formed by one side of a polygon and an extended adjacent side of the polygon.
This implies that, it is the angle formed outside a polygon when one of its sides is extended.
Using the above as a guide, we have the following:
The exterior angle is (a)