Which statement(s) can be used to prove that a given parallelogram is a rectangle?

The opposite angles of the parallelogram are congruent.
The diagnolas of the parallelouare congruent.
The diagnoles of the parallelogram bisect the angles.
The opposite sides of the parallelogram are congruent.

Question

Which statement(s) can be used to prove that a given parallelogram is a rectangle? 

The opposite angles of the parallelogram are congruent. 
The diagnolas of the parallelouare congruent. 
The diagnoles of the parallelogram bisect the angles. 
The opposite sides of the parallelogram are congruent.

563blackghost · Answer

A rectangle has two equal opposite sides with having 4 right angles....since it is a rectangle with right angles then the two opposite sides are parallel...|dw:1475627730594:dw|

A parallelogram has opposite equal angles and opposite equal sides....`parallel`ogram shows that the opposite sides are parallel....|dw:1475627811905:dw|

What do they both share?