Exterior angle of a regular 25-gon = 360/25 = 14.4 degrees.
So interior angle = 180-14.4 = 165.6 degrees.
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Exterior angle = 360/25 = 14.4 degrees
Interior angle = 180 - 14.4 = 165.6 degrees.
And, a regular polygon must be convex - by definition.
Exterior angle = 360/80 = 4.5 degrees. Interior angle = 180 - 4.5 = 175.5 degrees. And, a regular polygon has to be convex.
The formula to determine the sum of the interior angles of any regular polygon with n sides is (n-2) * 180. This means the measure of one angle is 168.4 degrees.
5
It is: 40 degrees and 90 degrees respectively
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