Interior Angle And Exterior Angle Formula. If you prefer a formula subtract the interior angle from 180. The sides of the angle are those two rays.
If n is the number of sides of a polygon then the formula is given below. For our equilateral triangle the exterior angle of any vertex is 120. 1 Putting the formula for sum of all interior angles in 1 we get Sum of exterior angles n x 180 n-2 x 180.
The sides of the angle are those two rays.
If n is the number of sides of a polygon then the formula is given below. An exterior angle is equal to the sum of the non-adjacent interior angles. Further we need to apply the n value in interior angle and exterior angle formula. The angle formed by any side of a polygon and the extension of its adjacent side is known as Exterior angle.