A rectangular prism has 3 pairs of congruent faces
a rectangular prism
This depends on if the question is asking for each pair of opposite rectangles must be congruent, then it is a rectangular prism.If all of the rectangles are congruent, then it must be a Cube. A square is a special case of a rectangle, and all 6 sides being squares makes a cube and they are all congruent.
It can be a rhombus, square plus a variety of polygons with 5 or more sides.
rectangular solid commonly called a box