If the length of each sides of a parallelogram is the same, angle between two adjacent sides is 90°, and the diagonals are the same, then the parallelogram is a square.
What is a parallelogram?
In Euclidean geometry, a parallelogram is a simple quadrilateral having two sets of parallel sides. The confronting or opposed sides and the opposing angles of a parallelogram are of equal length.
A rectangle, a rhombus, a square, and a parallelogram are all considered to be parallelograms under the definition.
There are three distinct varieties of parallelograms.
Rectangle: The parallelogram's opposite side is equal and parallel. 90° is the angle formed by two adjacent sides.
Rhombus: All sides are equal in length and opposite sides of the parallelogram are equal. The angle between two adjacent sides is not equal to 90°.
Square: The parallelogram's opposite sides are equal in length, as are all of its sides. 90° is the angle formed by two adjacent sides.
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