Question

The sum of the angles in a convex 10-sided polygon is:

1800°

188°

3600°

1440°

Answer 1

1440°

Explanation:

Sum of exterior angles = 360

One exterior angle = 360 ÷ 10

= 36°

Exterior angle + interior angle = 180

Interior angle = 180 - 36

= 144°

Sum of interior angles = 144° × 10

= 1440°