In an equilateral triangle, the value of each exterior angle is:

140° 100° 130° 120°

120°

In an equilateral triangle, Each angle of equilateral triangle is 60° . If ABC is a triangle, Exterior angle of a triangle is equal to the sum of the interior opposite angles. ∠A = ∠B = ∠C = 60°. According the theorem The value of each exterior angle = 60° + 60° = 120°