<Tr> <Td> Circumscribed circle diameter </Td> <Td> d OC = s csc ⁡ (π n) (\ displaystyle d_ (\ text (OC)) = s \ csc \ left ((\ frac (\ pi) (n)) \ right)) </Td> </Tr> <Tr> <Td> Properties </Td> <Td> Convex, cyclic, equilateral, isogonal, isotoxal </Td> </Tr> <P> In Euclidean geometry, a regular polygon is a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length). Regular polygons may be either convex or star . In the limit, a sequence of regular polygons with an increasing number of sides approximates a circle, if the perimeter is fixed, or a regular apeirogon, if the edge length is fixed . </P> <P> These properties apply to all regular polygons, whether convex or star . </P>

When can we say that a polygon is regular
find me the text answering this question