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Rectangular prism
A rectangular prism does not need to have any square faces. All its faces may be rectangular in shape. However, it may also have two or four square faces, yet still be a rectangular prism.
No unless it is in the shape of a cube
This depends on whether or not the prism is a rectangular prism or not. Simple shape prisms (rectangular, triangle, octagonal, hexagonal) all have rectangular faces.
Every rectangular prism does. That includes cubes.
They are all rectangular but there can also be 4 rectangular faces and 2 square faces. Always 6 in total.
Rectangular prism
A rectangular prism does not need to have any square faces. All its faces may be rectangular in shape. However, it may also have two or four square faces, yet still be a rectangular prism.
All six of them.
All six of them.
No unless it is in the shape of a cube
This depends on whether or not the prism is a rectangular prism or not. Simple shape prisms (rectangular, triangle, octagonal, hexagonal) all have rectangular faces.
Every rectangular prism does. That includes cubes.
A hexahedron of which a parallelepiped is a special case. A cuboid is a special case of a parallelepiped and a cube is an even more specific example. All the faces are quadrilaterals. A rectangular dipyramid (two rectangular pyramids stuck together along their rectangular faces) is another example. All faces are triangular.
Look at the prism. If all faces are rectangular (or square) then so are the bases. Otherwise they are the two congruent parallel faces that are not rectangular. Look at the prism. If all faces are rectangular (or square) then so are the bases. Otherwise they are the two congruent parallel faces that are not rectangular. Look at the prism. If all faces are rectangular (or square) then so are the bases. Otherwise they are the two congruent parallel faces that are not rectangular. Look at the prism. If all faces are rectangular (or square) then so are the bases. Otherwise they are the two congruent parallel faces that are not rectangular.
A parellelepiped (pronounced parellel pie ped) is any shape with 6 faces and 12 edges. A cuboid, also called a rectangular parallelepiped, is a parallelepiped of which all faces are rectangular. A cube is a cuboid with square faces. A rhombohedron is a parallelepiped with all rhombic faces. A trigonal trapezohedron is a rhombohedron with congruent rhombic faces. http://commons.wikimedia.org/wiki/File:Parallelepipede.png
A cuboid (rectangular prism) is the only shape with 6 rectangular faces (3 pairs of rectangles in fact). A cube is a special type of cuboid where all the rectangles are squares. Both cubes and cuboids are special types of hexahedron (polyhedrons with 6 faces). The only shape with 6 equal rectangular faces is the hexagonal prism. However, since it also has two hexagonal faces it is therefore an irregular octahedron rather than a hexahedron.