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octagonal prism and decahedron
A triangular prism and a square pyramid.
No, you are thinking about 3d figures
There are many such shapes, not just two. Here are some:A nonagonal pyramidAn octagonal prismA square anti-prism (two square faces, with triangles between them)A decahedronA pentagonal bipyramid (two pentagonal pyramids stuck together at their pentagonal faces).Each one is known as a decahedron (plural decahedra).
Faces on solid figures are like when you look at a square you see a flat wall type surface.