What is the measure of each exterior angle of a regular triangle

Answer:Each pair of interior angle and the exterior angle

So the exterior angle = 360° - the interior angle.

So, for an equilateral triangle we have 360/3 = 120 degrees as the exterior angle, and 180-120 = 60 degrees as the interior angle. For a square, you get 360/4 = 90 degrees as the exterior angle and 180-90 = 90 degrees as the interior angle.