The sum S of the interior angles of a polygon is
S = (m - 2) * 180º
where m is the number of sides of the polygon.
Then, since the given polygon has 10 sides, m = 10, and its sum is:
S = (10 - 2) * 180º = 8 * 180º = 1440º
Now, since this sum is expressed as 360n, we have:
360n = 1440
n = 1440/360
n = 4
Therefore, the second option is correct.
