SOLUTION: Find the measure of each interior angle of a regular 21-gon.

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Question 1056455: Find the measure of each interior angle of a regular 21-gon.
Found 2 solutions by Alan3354, Boreal:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Find the measure of each interior angle of a regular 21-gon.
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Step 1, exterior angles = 360/21
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The sum of exterior angles of all polygons is 360 degs
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Step 2, interior angles = 180 - exterior angle.

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The exterior angles sum to 360 and there are 21 of them.
Therefore, each exterior angle is 360/21=17.14 degrees
The interior angle is the supplement, or 162.86 degrees