(n-2)180 degrees
180(18)= 1440 degrees
1440/18=80 degrees
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each angle of a hexigon is 120 degrees
The measure of one angle of a regular pentagon is 108 degrees.
A right angle is a measure of 90 degrees or a 1/4 of a turn
1 plus 2 is equal to 3
If you mean the exterior angle of 1 degree then it will have 360 sides.