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If we refer to your 8 sided shape as a regular octagon we can use the formula 360/n to work out the side of a single exterior angle.

n refers to the number of sides.

In this case the equation you would use would be 360/8 which in turn equals 45 degrees.

So the size of a single exterior angle in a octagon is 45 degrees.

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12y ago

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How do you find the exterior angle in a regular polygon with eight sides?

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Exterior angle = 360/number of sides = 360/15 = 24 degrees.Interior angle = 180 - Exterior angle = 180 - 24 = 156 degrees.Angle at centre = Exterior angle = 24 degrees.Exterior angle = 360/number of sides = 360/15 = 24 degrees.Interior angle = 180 - Exterior angle = 180 - 24 = 156 degrees.Angle at centre = Exterior angle = 24 degrees.Exterior angle = 360/number of sides = 360/15 = 24 degrees.Interior angle = 180 - Exterior angle = 180 - 24 = 156 degrees.Angle at centre = Exterior angle = 24 degrees.Exterior angle = 360/number of sides = 360/15 = 24 degrees.Interior angle = 180 - Exterior angle = 180 - 24 = 156 degrees.Angle at centre = Exterior angle = 24 degrees.


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