Answer:
Not sure what you mean, but I'm assuming you're referring to the sum of all the interior angles of a polygon. In that case:
Total sum of interior angles of a polygon ->
However, if you are looking for the degrees of each interior angle, you must divide the total interior angle degrees by the amount of sides on the polygon, n
Degree of each interior angle of a polygon ->
In both cases, n represents the amount of sides the polygon has.