Three. There are three rectangles that are joined along their parallel edges which forms a triangle at each end.
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It is a triangular prism which has 5 faces, 9 edges and 6 vertices
That shape is called a triangular prism. A prism is made of rectangles arranged in a tube with any 2D shape at the ends. This shape determines what kind of prism it is, you can get pentagonal, hexagonal, and many other types of prism.
A triangular prism would fit the given description which has 5 faces, 9 edges and 6 vertices
That the triangles will be congruent
6 rectangles an 2 hexagon * * * * * A hexagonal prism.