Answer:
120°
Step-by-step explanation:
The sum of all interior angles is found using (n - 2)180
n is the amount of angles inside the polygon (in this case, 3). Plug in 3 for n:
(3 - 2)180 = (1)(180) = 180
There are 3 sides in a triangle. Divide the total (180) with 3:
180/3 = 60
Next, Subtract 60 from 180:
180 - 60 = 120
120 is your exterior angle.
120° is your answer.
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