A 13 sided polygon interior angles add up to 1980 degrees
6
If each interior angle measures 174 degrees then it will have 60 sides
Providing that it is a regular 18 sided polygon each interior angle measures 160 degrees.
2160 degrees
If it's a regular polygon then each interior angle measures 120 degrees.
1800 degrees
A 13 sided polygon interior angles add up to 1980 degrees
Each interior angle of the regular 5 sided polygon measures 108 degrees
The interior angles of a 17 sided polygon add up to 2700 degrees
A regular 12 sided polygon each interior angle measures 150 degrees
1440 degrees
1440 degrees
6
128.57 degrees
4,140 degrees
3600 Degrees