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Pentagonal bipyramid

In geometry, the pentagonal bipyramid is a polyhedron with 10 triangular faces. It is constructed by attaching two pentagonal pyramids to each of their bases. If the triangular faces are equilateral, the pentagonal bipyramid is an example of... Wikipedia
Dual polyhedron: pentagonal prism
Edges: 15
Faces: 10 triangles
Vertices: 7