Take a square sheet, say PQRS (Fig 3.42). Fold along both the diagonals. Are their mid-points the same? Check if the angle at O is 90° by using a set-square. This verifies the property stated.
Property: The diagonals of a square are perpendicular bisectors of each other.
PO = OR ( Square is a type of parallelogram)
By SSS congruency rule, and
are congruent triangles.
&
Hence,.
Thus, we can say that the diagonals of a square are perpendicular bisectors of each other.