Square, or a rectangle. * * * * * Since it is a REGULAR polygon, it cannot be a rectangle. So the only answer is a square.
A square
a square or rectangle
A regular polygon is a polygon in which all sides and angles are congruent, so a rectangle is a regular polygon when it is a square: when all sides are equal.
All of them.
The rectangle and polygon
A square or rectangle
triangle square rectangle hexagon
a square or a rectangle
"Square. Congruent means "the same". A rectangle with 4 sides that are the same is a square." Plus, it is not a rectangle. It is a polygon. The question should have been stated: What is a polygon with congruent sides?
Square, rectangle or and circle but an circle is not a polygon,
A square is a type of polygon, rectangle, parallelogram and quadrilateral.