Not all are. Not only is it a concave shape, but the interior angles can vary. For a polygon to be regular, it must be equilateral and equiangular.
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An irregular polygon is a plane (2-dimensional) shape which is bounded by straight lines that meet in pairs. If all the sides are congruent AND all the angles are congruent then the polygon is regular: otherwise it is irregular.
I do not no how about you find out what a polygon is then count the sides -A
The circle is not a polygon because it is not composed of straight line segments.A star (outline shape) is actually an irregular concave decagon (5 pointed) or dodecagon (6 pointed).
Yes, a parallelogram is an irregular polygon because its sides and angles are not all the same. For a shape to be a regular polygon it must be equangular (all angles are the same) and equilateral (all sides have the same length).
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