To find the measure of each interior angle of a regular polygon, we use the formula: (n-2) * 180 / n, where n is the number of sides of the polygon. In this case, a regular 125-gon has 125 sides. So, each interior angle would measure (125-2) * 180 / 125 = 172.8 degrees.
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Each of the four interior angles of a square (i.e. a regular quadrilateral) measures 90 degrees
An interior angle of a regular octagon is 45 degrees. The exterior angles measure 315 degrees.
The interior angles add up to 360 degrees.
This is a tautological question that does not have a proper answer. A regular polygon is one which has all its sides of equal length and all its interior angles of equal measure.
Each interior angle = sum of angles/number of sides