The interior angles add up to 1080 degrees.
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If you rotate a 20-sided regular polygon by 360/20 degrees, the result will look the same as the original polygon. Any additional rotation will be a multiple of this number.
An octagon is a 8 sided polygon and not a number but 8^4 = 4096
The measure of the exterior angle of a 11-sided polygon = 360⁰/11 = 32 72/99⁰ = 32 8/11⁰
45 degreesIt is: 360/8 = 45 degreesEach exterior angle measures 45 degrees.
The sum of the exterior angles of a regular polygon = 360° If an exterior angle measures 8° then the number of sides = 360/8 = 45