A rectangle.
A quadrilateral with 4 right angles and opposite sides that are parallel can be either a rectangle if the adjacent sides are of different length or a square if the adjacent sides are of the same length.
A perfect square Four 90 degree angles and four equal sides
A square, rectangle, or quadrilateral A square, rectangle, or quadrilateral
A regular quadrilateral is a square. It is a four-sided figure with all sides being the same length and all angles equal (right angles).
Such a figure is called a square. Actually only one right angle is enough to force the the other angles to be right, and if three sides are equal, that forces all sides in such a figure to be equal. Exercise: Prove that any 4-sided figure( called a quadrilateral in math books) with three equal sides and one right angle is a square.
It is a rectangle. Just picture it. 4 right angles and 2 sides that are the same length.
Sides cannot be right angles whatever the figure because sides are sides and not angles, the answer you are looking for is a rhombus.
A four-sided figure with two pairs of parallel sides the same length and four right angles is called a square.
Jeeme
A quadrilateral with 4 right angles and opposite sides that are parallel can be either a rectangle if the adjacent sides are of different length or a square if the adjacent sides are of the same length.
square
rhombus (although the angles can technically be right angles as well)
Square
rhombus
A perfect square Four 90 degree angles and four equal sides
A square, rectangle, or quadrilateral
A rhombus. A square is one special rhombus with right angles.