Providing that it is a regular 20-gon then each exterior angle is 360/20 = 18 degrees
What is the measure of ONE exterior angles for a 20-gon?
Each exterior angle measures 72 degrees
Each exterior angle measures 20 degrees Each interior angle measures 160 degrees
exterior angle theorem
Each interior angle is 156 degreesEach exterior angle is 24 degrees
Each interior angle measures 150 degrees Each exterior angle measures 30 degrees
Each exterior angle measures 72 degrees
Each exterior angle measures 72 degrees
Exterior angle measures 18 degrees Interior angle measures 162 degrees
Each exterior angle measures 20 degrees Each interior angle measures 160 degrees
exterior angle theorem
Providing that it is a regular duodecagon each exterior angle measures 30 degrees
Each exterior angle measures 36 degrees
Each exterior angle measures 15 degrees
Each exterior angle measures 120 degrees
Each exterior angle measures 40 degrees
Providing that it is a regular nonagon then each exterior angle measures 40 degrees and each interior angle measures 140 degrees
360 degrees