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You can find the exterior angle (in degrees) using the following formula:

360 / number of sides

For example, a pentagon has 5 sides to the exterior angle is:

360 / 5 = 72 degrees

Really, the answer is just in degrees because we measured our circle in degrees. More generally, the formula would be:

measure of full circle / number of sides

This way, you can use radians (2 * PI / number of sides) or seconds (60 seconds / number of sides) or whatever

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Q: What are the exterior angles in a regular polygon?
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