A cuboid
A rectangular prism, it has 6 rectangular faces.
a rectangular prism
A cuboid.
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.
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