Answer:
Yes, the diagonals are congruent
Explanation:
A triangle is a special kind of a parallelogram that has congruent sides. The sides are congruent as they have the same lengths and and angles of bisection.
In other words, the vertically opposite angles will be equal as well.
Since the angles corresponding to the sides of the vertically opposite angles are equal, it means that the sides are also congruent.
Doing a measurement with a protractor proves that the angles formed by the perpendicular lines will be right angles.