The number of faces in a prism is one face for each of the sides of its cross-section plus the two end faces.
A quadrilateral prism has a quadrilateral as its cross-section.
Therefore it has 4 + 2 = 6 faces.
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it has five faces
There can be a heptagonal prism or an octagonal prism, but there is no such thing as a hectagonal prism.
A rectangular prism has 3 pairs of congruent faces
It has 16 vertices and 10 faces. It is an octagonal prism.
Sides and faces are the same thing. A hexagonal prism has 8 faces and 12 vertices.