There are many options:
2 rectangular prisms
2 cubes
2 parallelepipeds
2 tetrahedrons
2 square based pyramids
are some possibilities using convex polyhedra.
There are six rectangles, consisting of three pairs of congruent rectangles.
A rectangular prism is the only shape that is made up from only rectangular faces. But there are countless shapes which contain rectangular faces along with other shapes.
Of rectangles and squares.
A rectangular prism has 6 flat surfaces
A rectangular prism that is 4 cubes by 2 cubes is made up of 8 cubes.
Squared. When you find surface area, you are only finding the area of the shapes that make up the three-denominational shape.
There are six rectangles, consisting of three pairs of congruent rectangles.
A rectangular prism is the only shape that is made up from only rectangular faces. But there are countless shapes which contain rectangular faces along with other shapes.
Of rectangles and squares.
A rectangular prism has 6 flat surfaces
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A rectangular prism that is 4 cubes by 2 cubes is made up of 8 cubes.
Rectangle
In a rectangular prism, a "face" refers to any of the flat surfaces that make up its boundary. A rectangular prism has six faces, each of which is a rectangle. These faces include the top, bottom, and four side surfaces, all meeting at edges and corners. The orientation of these faces can vary depending on how the prism is positioned, but they are always rectangular in shape.
Two hexagons and six rectangles
A hexagon and a rectangle.