A Square
A rhombus is a quadrilateral polygon with four sides of all equal length.
A square.
That would be a square.
A square has 4 right angles and 4 equal sides.
It is a Rectangle
A parallelogram is a four sided polygon with opposing parallel sides of equal length. Then if it has four right angles, the polygon becomes a rectangle.
It is a polygon. It has four sides of equal length. It has four angles which are all right angles. Its two diagonals bisect each other at right angles. Its area is the square of the length of its side.
regular polygon\
a polygon with 4 right angles and 4 sides of the same length
A rhombus is by definition a polygon with four sides of equal length. Since the sum of the internal angles of a polygon with four sides is 360° , a polygon with four sides can have four angles all equal to 90°. In this case we have a particular type of rhombus called square.
I hope this is ot your homework...The answer is a square...I think!