The answer will depend on what it is that is being summed: the interior angles, exterior angles, lengths of sides, lengths of diagonals, ... . Since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.
Chat with our AI personalities
360 degrees
The sum of the exterior angles of any polygon (however many sides) is 360 degrees. IF it is a regular 14-gon, each exterior angle is 360/14 = 25.71 degrees.
Sum of what aspect of a 20-gon: the length of its sides, its interior angles, its exterior angles, its apothems?
The interior angles of a 30-gon add up to 5040 degrees
hahaa.... i don't know!