The exterior angles of any polygon always add up to 360 degrees
Only when it is a regular polygon that all interior angles are of equal measure
a "regular" polygon
a convex polygon has 6 sides . What is the sum of the measure of its interior angles?
A regular polygon.
That would be a regular polygon.
Only if the polygon is "regular".
The exterior angles of any polygon add up to 360 degrees
A regular 10 polygon
octagon
All of the angles are equal in a "regular" polygon. (All of the sides are too.)
It is then called a regular polygon when all angles and sides are of equal values.
Only if the polygon is a regular quadrilateral.