In a regular polygon, each interior angle is thrice the exterior angle. The number of sides of the polygon is

Let x be the exterior angle


Interior Angle = 3x


Interior Angle + Exterior Angle = 180°


4x = 180°


X= 180/4


= 45°


So, Exterior Angle = 45°


No. of Sides = 360 / Exterior Angle


= 360 / 45


= 8

11