There is no regular polygon with an interior angle of 20o.
If the interior angle is 120o then there are six sides and the sum of the angles is 720o.
If each interior angle measures 174 degrees then it will have 60 sides
Each interior angle measures 140 degrees
Providing that it is a regular 18 sided polygon each interior angle measures 160 degrees.
It is a 5 sided regular pentagon and each interior angle measures 108 degrees
If it is a regular polygon and each interior angle measures 156 degrees then it will have 15 sides
Each interior angle of the regular 5 sided polygon measures 108 degrees
If it's a regular polygon then each interior angle measures 120 degrees.
1800 degrees
It is a regular 20 sided polygon
1440 degrees
1440 degrees
A regular 12 sided polygon each interior angle measures 150 degrees
If each interior angle measures 174 degrees then it will have 60 sides
540 degrees
Each interior angle measures 140 degrees
No regular polygon can have an interior angle of 180 degrees or more. No regular polygon can have an interior angle of 180 degrees or more. No regular polygon can have an interior angle of 180 degrees or more. No regular polygon can have an interior angle of 180 degrees or more.
Not possible - the smallest interior angle for a regular polygon is 60 degrees - which creates an equilateral triangle.