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APEX!!
The measure of an angle whose sides overlap is 0 degrees. It is than not an angle, but rather a line.
For the sides to overlap, the angle must be so wide as to double back over itself. Thus, it must be 360 degrees or greater.
0 degrees
If the exterior angle is 18 degrees then it will have 20 sides.
If the exterior angle is 45 degrees then it will have 8 sides
It will have 10 sides and each interior angle measures 144 degrees while each exterior angle measures 36 degrees
Each interior angle will measure 162 degrees
Each interior angle will measure 156 degrees
It will have 14 sides and each interior angle will measure 2160/14 degrees
If its interior angle measures 156 degrees then it will have 15 sides
A regular polygon having an interior angle of 120 degrees will have 6 sides and is called an hexagon.
If its a regular polygon and each interior angle is 165 degrees then it has 24 sides