The special quadrilaterals that have congruent diagonals are:
- Rectangle - The diagonals of a rectangle are congruent.
- Square - A square is a specific type of rectangle, so its diagonals are also congruent.
The other options do not have congruent diagonals:
- Rhombus - The diagonals of a rhombus are not congruent; they bisect each other at right angles.
- Parallelogram - The diagonals of a parallelogram are not necessarily congruent; they bisect each other but are only congruent in the special case of a rectangle.
Therefore, the quadrilaterals from the list that have congruent diagonals are rectangle and square.
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