The sum of the interior angles of any regular polygon is (n - 2) X 180
30 = n
[(30) - 2] × 180
28 X 180
5040
The interior angle of a regular polygon = the sum of interior angles ÷ number of sides
5040 ÷ 30 = 168
Therefore the measure of each interior angle in a regular 30-sided polygon is 168°