Answer:
x=14 and the measure of each angle is 108
Step-by-step explanation:
Using the polygon formula (n-2) * 180 where n is the number of points
There are five points, so (5-2)*180 = 3*180=540
Since the sides are all equivalent, meaning that the angles are all equivalent as well, 540/5 = 108 is the measure of each angle in the pentagon
Therefore, 9x-18=108 9x=126 x=14
x=14 and the measure of each angle is 108
