A regular polygon is one whose angle measurements are all equal and side lengths are all equal.
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Regular polygon is equilateral and equiangular. Irregular polygon is non-equilateral and non-equiangular.
The term regular polygon is almost always used to refer to a polygon that has equal interior angles and equal side lengths. In that light, the equiangular polygon and a regular polygon are the same thing.
regular polygon mean equal sides, equal angles irregular polygon mean it is not equal :)
Any polygon that has an angle that is > 180º is a concave polygon. A convex polygon does not. e.g. All regular polygons are convex.
A regular polygon has all its angles equal AND all its sides equal. A nonregular polygon has at least one angle or one side that is different from the others.