If it is a regular polygon then each exterior angle is 360/20 = 18 degrees
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It is: 40 degrees and 90 degrees respectively
20 degrees
360 ÷ 100 = 3.6° each
The measure of one exterior angle of a regular 18-gon is 20°. The sum of all exterior angles of a regular polygon is always 360° so the measure of each exterior angle can be calculated by dividing 360° by the number of sides. In this case that would be: 360° 18 = 20°Therefore the measure of one exterior angle of a regular 18-gon is 20°.
Each exterior angle measures 24 degrees. Each interior angle measures 156 degrees