72 degrees
20.
Each exterior angle measures 8 degrees
Providing that it is a regular octagon each exterior angle measures 45 degrees.
When a polygon is regular, each exterior angle is equal to the other exterior angles. Since the sum of all the exterior angles is 360 degrees, if you divide 360 by the measure of one exterior angle, you will get the number of sides. If you instead have the measure of an interior angle, simply calculate (180 - interior angle measure) to find the measure of the exterior angle, and use the above paragraph.
16.36* It is, in fact, twice that: 32.7272.. degrees.
The largest exterior angle measure is 120o. It is the exterior measure of an equilateral triangle (which is a regular polygon).
Each exterior angle will measure 9 degrees
360/number of sides = exterior angle
Providing that it's a regular decagon then each exterior angle will measure 36 degrees
It is: 180-exterior angle = interior angle because there are 180 degrees on a straight line
Each exterior angle of a regular octagon measures 45 degrees
Each exterior angle of a regular 6 sided hexagon measures 60 degrees
Providing that it is a regular hexagon then each exterior angle will measure 60 degrees
Providing that it is a regular polygon then each exterior angle will measure 12 degrees
Providing that it's a regular decagon then each exterior angle will measure 36 degrees
Each exterior angle measures 40 degrees