Question

What is the sum of the interior angles of a convex nonagon?

1620°
1800°
1260°
3240°

Answer 1

1,260°

Explanation:

Nonagon is a 9 sided polygon

Exterior angle = 360 ÷ 9

= 40

Interior angle + exterior angle = 180

Interior angle = 180 - 40

= 140°

Sum of interior angles = 140° × 9

= 1,260°