30/5 = 6 so x - 2 = 6 so x = 8
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Sum_of_interior_angles = (number_of_sides - 2) × 180° → for a 30-gon sum = (30 - 2) × 180° = 5040°
Two angles are complementary if their sum equals exactly 90 degrees. Two angles are supplementary if their sum equals exactly 180 degrees, so a 30 degree angle is supplementary with a 150 degree angle.
The sum of the first 30 positive integers is: 465.
We know that the sum of a polygon's exterior angles, one at each vertex, equals 360 degrees. So at each angle extended from each side there is an angle of 30 degrees. If x= number of sides, then 30x = 360. Divide by 30 and x = 12.
The sum of the first 30 positive even numbers is 930.