Conider the following is statements :
p : A parallelogram is a rhombus.
q : the diogonals are at right angle.
The compound proposition " A parallelgram is a rhombus iff its diagonals are a right angle " is representd by

If a parallelogram has all its angles as right angles, then it is a

Which of the following statements are True or False : A parallelogram with one right angle is a square.

For two statement p and q p : A quadrilateral is a parallelogram q : The opposite sides are parallel Then, the compound proposition, ''A quadrillateral is a parallelogram if and only if the opposite sides are parallel'' is represented by

Diagonals of the parallelogram bisect each other at right angles .

Theorem(Diagonal property of a rhombus) the diagonals of a rhombus bisect each other at right angles.