irregular
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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).
regular shape is a shape that has same sides irregular shape is a shape that has diffrent sides
Irregular shapes have NO lines of symmetry and all the sides are not the same. A regular shape WILL have lines of symmetry and all the sides are the same. * * * * * Wrong! A kite, for example, is an irregular but it has reflective symmetry. A parallelogram is an irregular quadrilateral but has rotational symmetry.
if it has all congruent sides, then it is regular
A quadrilateral. It may be a rectangle, parallelogram, trapezoid, or an irregular quadrilateral.