In a certain regular polygon, the measure of each interior angle is $2$ times the measure of each exterior angle. Find the number of sides in this regular polygon.
Measure of each interior angle = (n-2)180 / n
Measure of each exterior angle = 360 / n
So
(n -2) 180 / n = 2 *360 / n
180n - 360 = 720
180n = 720 + 360
180 n = 1080
n = 1080 / 180 = 6
+1911 
