There are 720 degrees in a 6 sided polygon.
The degrees in a 19 sided polygon add up to 3,060 degrees
The interior angles of a fifteen sided polygon amount to 2340 degrees.
The interior angles of a 13 sided polygon add up to 1980 degrees
1800 degrees (that is the sum of the internal angles of the 12-sided polygon).
The sum of the exterior angles of a polygon, however many sides it has, is 360 degrees. If the 20 sided polygon is regular, its angles are equal, and each is then 360/20 = 18 degrees.
2340 degrees would be in a 16 sided polygon.
if it is a polygon then the total interior angles will equal 1080. so ear angle will be 135 degrees.
Exterior angles add up to 360 degrees Interior angles add up to 1260 degrees
700
180
106