How many sides does a polygon have if the sum of the measures of the interior angles is 3960

degrees?

Answer: the polygon has 20 sides.

Step-by-step explanation:

The formula for determining the sum of the measure of the interior angles in a regular polygon is expressed as (n - 2) * 180.

if the sum of the measures of the interior angles is 3960

degrees. This means that

(n - 2) * 180 = 3960

Expanding the brackets by applying the distributive property, it becomes

180n - 360 = 3960

180n = 3960 - 360

180n = 3600

Dividing both sides by 180, it becomes

n = 3600/180

n = 20