Answer:
13 sides
Step-by-step explanation:
Sum of interior angles of a polygon = (n - 2)180° where n is the number of sides of the polygon.
1980° = (n - 2)180°
Divide both sides by 180°
n - 2 = 1980 / 180
n - 2 = 11 Add +2 to both sides
n = 11 + 2
n = 13
The number of sides of the polygon = 13
