The interior angles of a 13 sided polygon add up to 1980 degrees
Chat with our AI personalities
A 13 sided regular polygon
The sum of the interior angle measure of a 13-sided polygon is 1980 degrees. It is solved by doing: 180(s-2) 180(13-2) 180(11) = 1980 degrees *s- meaning sides*
Providing that it is a regular polygon then each interior angle will measure 160 degrees
The sum of the exterior angles is always 360 degrees.
The measure of a single internal angle of any regular polygon is equal to 180 (n - 2) / n. Therefore, an internal angle of a regular icosikaiheptagon (27-sided polygon) is equal to 13.3 recurring, or 13 and one third, degrees. It thereby follows that a measure of the external angle of the same polygon is equal to 180 - 13 and one third = 166.6 recurring, or 166 and two thirds, degrees.