Prove that the diagonals of a square are equal.

Show that the diagonals of a square are equal and bisect each other at right angles.

Show that the diagonals of a square are equal and bisect each other at right angles.

Prove that the diagonals of a rectangle are equal.

Prove that the diagonals of a rectangle are perpendicular if and only if the rectangle is a square.

Prove analytically that the diagonals of a rectangle are equal

prove that the diagonals of a rectangle are perpendicular if and only if the rectangle is a square.

Prove that the diagonals of a rectangle bisect each other and are equal.

Show that if the diagonals of a quadrilateral are equal and bisect each other at right angles,then it is a square

Show that if the diagonals of a quadrilateral are equal and bisect each other at right angle, then it is a square.

If (alpha,beta) is one end of the diagonal of a square and equation of other diagonal is x-y=alpha vertex of the square is: