A cuboid
A rectangular prism, it has 6 rectangular faces.
a rectangular prism
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.
A cuboid.
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
A rectangular tube.
rectangular prism
a cube
rectangular prism
Yes, and three rectangular faces.
the other faces on a pentagonal prism would be rectangular
the 3d shape that that has no flat face is the circle