Interior degrees add up to 1080 degrees
Exterior degrees add up to 360 degrees
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The sum of the exterior angles of any polygon must be 360 degrees.360/8 = 45 degrees
Exterior angles: 360 degrees Interior angles: 1080 degrees
The 8 exterior angles add up to 360 degrees
Using a protractor an 8 sided octagon angles will add up to 1080 degrees Or use the formula: (n-2)*180 = sum of interior angles whereas 'n' is the number of sides of the polygon
Exterior angles . . . 360 degrees Interior angles . . . 1,080 degrees Total . . . . . . . . . . . 1,440 degrees