Which polygon has an interior angle sum of 1080°?

A polygon has 8 sides.

A polygon has 10 sides.

A polygon has 9 sides.

A polygon has 7 sides.

Answer:A polygon with 8 sides called octagon

Step-by-step explanation:

sum of interior angles in a polygon=180 (n-2)

n=number of sides

1080=180 (n-2)

Divide both sides by 180

1080/180=180 (n-2) / 180

6=n-2

Collect like terms

n=6+2

n=8

number of sides=8

8 sides