If the figure below is a regular polygon, find the value of x.
(9x-18) please help

Answer:
x = 14
Step-by-step explanation:
"Regular" means all the angles are the same. So all of the angles will be 9x-18. Next, the total of all the angles added up is 540°
5 (9x - 18) = 540
Divide both sides by 5
9x - 18 = 108 add 18 to both sides
9x = 126 divide by 9
x = 14