A rectangle has four sides with two equal lengths.
A parallelogram is a four sided shape where opposite sides are parallel and equal lengths. If you mean that ALL sides are equal lengths, you are looking for a rhombus.
It is a rhombus
A rhombus is a four-sided shape (quadrilateral) that has all sides equal in length, but its diagonals are of different lengths. In a rhombus, the diagonals bisect each other at right angles, leading to their unequal lengths. While all sides are congruent, the angles can vary, resulting in the differing lengths of the diagonals.
A shape with four sides where no side is equal in length is called a trapezoid (or trapezium in some regions). This quadrilateral has at least one pair of parallel sides, while the other two sides can be of different lengths. The sides can vary significantly, leading to a variety of trapezoidal shapes.
A shape that has four sides but does not have all sides the same is a rectangle. In a rectangle, opposite sides are equal in length, but the adjacent sides can be of different lengths. This distinguishes it from a square, which has all four sides equal. Other examples include trapezoids and irregular quadrilaterals.
A shape with four sides that are not equal is called a trapezoid (or trapezium in some regions). In a trapezoid, at least one pair of opposite sides is parallel, while the other two sides can vary in length. This results in a four-sided figure with unequal side lengths. Other examples of quadrilaterals with unequal sides include irregular quadrilaterals.
square
The shape you are describing is a trapezoid (or trapezium in some regions). Specifically, it is an isosceles trapezoid, where the two non-parallel sides are equal in length while the two parallel sides are of different lengths. This configuration creates a trapezoid with the specified characteristics.
A square is defined as a quadrilateral with four equal sides and four right angles. Each of its sides is of equal length, ensuring that the shape is both symmetrical and balanced. The four vertices are the points where the sides meet, forming the corners of the square. This unique combination of equal lengths and right angles gives the square its distinctive properties.
Rectangle
A rhombus is a shape having two acute angles and four equal sides.
There are no specific names for such a shape.