Answer:
140 degree
Step-by-step explanation:
The sum of the interior angle measures in a regular polygon is 1260 degree.
(n-2)*180=1260
180n-360=1260
180n=1260+360
180n=1620
n=1620/180
n=9
Now, evaluate the measure of one of the interior angles of the polygon.
((9-2)*180)/9=140 degree.