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The sum of the exterior angles of a polygon is 360 degrees - irrespective of the number of sides or vertices, or whether the polygon is regular or convex.
If the polygon is regular - ie all its angles are equal, then the measure of each angle is simply 360 divided by the number of sides/vertices.
Assuming the 18-gon in question is regular - and there is no good reason for such an assumption - each exterior angle would be 360/18 = 20 degrees.
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What are the exterior angles on a 20 sided polygon?
The sum of the exterior angles of any polygon and the extension of its adjacent side is 360 degrees.If the 20 sided polygon is regular, then each angle is equal so that each one is 360/20 = 18 degrees.
Each exterior angle of a regular polygon measures 20 degrees how many sides does the polygon have?
The sum of the exterior angles of any polygon is 360 degrees. If each angle is 20 degrees, there must be 360/20 = 18 such angles. 18 angles means 18 sides so it is an 18-sided polygon.
What is the exterior angle of a regular 18 sided polygon?
20 degrees. The exterior angles always add up to 360 degrees.
What is the sum of the exterior angles of a 18 sided polygon?
360 degrees, it's the same for every polygon360 degrees is the sum of the angles of any side and the extension of the adjacent side in a polygon.With an 18 sided regular polygon this would be 20 degrees.See the related link for a graphic.
Each interior angle of a regular polygon measures 162 degrees How many sides does the polygon have?
I believe it may be a 20-sided polygon (a 20-gon). Usually the interior and exterior angles add up to 180. 180 - 162 = 18 So 18 is the exterior angle. Since the exterior angles add up to 360 degrees 360/18 = 20 There you have your answer.
