ANSWER
i. 180°
ii. 60°
iii. 360°
iv. 120°
Step-by-step explanation
The given regular polygon has 3 sides.
Since all the three sides are equal, it is called an equilateral triangle.
The sum of interior angles of an equilateral triangle is 180°
One interior angle is 60° because all the three angles are equal.
The sum of exterior angles is 360°
One exterior angle is 120° because all the three exterior angles are equal.