A polygon is a 2-D figure with no faces, so a hozec-agon (whatever one of those is) has no faces.
A 3-D figure (possibly with faces) is a polyhedron.
A cuboid has 3 pairs of parallel faces.
A rectangular prism has six faces, and each pair of opposite faces is parallel to each other. Therefore, a rectangular prism has three pairs of parallel faces.
An octagonal prism has a total of 5 pairs of parallel faces. It has two parallel octagonal bases and eight rectangular lateral faces, with each rectangle having a parallel counterpart on the opposite side of the prism. Thus, the pairs of parallel faces consist of 1 pair for the octagonal bases and 4 pairs for the rectangular faces.
It can have one, two or three pairs of parallel faces.
Three.
There are 257 topologically different convex octahedra. Many of these will have no parallel faces. It can have four pairs of parallel faces.
A cuboid has 3 pairs of parallel faces.
A rectangular prism has six faces, and each pair of opposite faces is parallel to each other. Therefore, a rectangular prism has three pairs of parallel faces.
An octagonal prism has a total of 5 pairs of parallel faces. It has two parallel octagonal bases and eight rectangular lateral faces, with each rectangle having a parallel counterpart on the opposite side of the prism. Thus, the pairs of parallel faces consist of 1 pair for the octagonal bases and 4 pairs for the rectangular faces.
It can have one, two or three pairs of parallel faces.
3 pairs
Three.
Three pairs.
21
3 pairs
A triangular based pyramid has zero pairs of parallel faces. In a triangular based pyramid, all three faces of the base are not parallel to the apex, which means there are no pairs of parallel faces in this type of shape.
A rectangular prism has three pairs of parallel faces. Each pair consists of two opposite faces that are identical in shape and size: two pairs of rectangular faces on the top and bottom, two pairs on the front and back, and two pairs on the left and right sides. Thus, there are a total of three pairs of parallel faces.