it is the square
Rectangles and squares
A quadrilateral. (which may have a pair of parallel sides, or two pair, as follows:) If opposite sides are parallel and equal in length, but angles are not right angles, it is a rhombus. If opposite sides are parallel, all angles are right angles, but there are two sides longer than the other two, it is a rectangle. If all four sides are the same length, and all angles are 90°, it is a square. It is also a Trapezium e.g Rectangle.
A four-sided figure with 90-degree angles is called a rectangle. If all sides are of equal length, it is specifically known as a square. Both shapes belong to the category of quadrilaterals and have opposite sides that are parallel and equal in length.
A square or rectangle are the only regular polygons, but many other shapes have two right angles and two parallel lines.
A four-sided figure with opposite sides that are parallel is called a parallelogram. This category includes shapes such as rectangles, rhombuses, and squares, all of which have the property of parallel opposite sides. Parallelograms also have additional properties, such as opposite angles being equal and the diagonals bisecting each other.
In geometry, the shapes that have consecutive angles that are supplementary are parallelograms, rectangles, rhombuses, and squares. In these shapes, each pair of consecutive angles adds up to 180 degrees. This property is a result of the opposite angles being equal and the parallel sides of the shapes. Consequently, each pair of adjacent angles must sum to supplement the angles on the opposite side.
A trapezoid (or trapezium in some regions) has one pair of parallel sides and typically does not have any right angles. The non-parallel sides can be of different lengths and angles, which allows for various trapezoid shapes. This characteristic distinguishes it from rectangles, which have right angles.
a square and a rectangle
There are no parallel sides on a nonagon (nine-sided figure)... Regular shapes with an odd-number of sides have no parallel sides.
Polygon
Any polygon with 2n sides (n integer) where opposite sides are parallel, will have its opposite angles congruent.
Yes, the sides of rectangles and squares are parallel to each other. In both shapes, opposite sides are equal in length and run parallel, maintaining consistent distances between them. This property ensures that all angles in rectangles and squares are right angles (90 degrees). Thus, both shapes have a structured and uniform geometry.