a octahedron
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An eight-faced 3D shape is called an octahedron. Any 3D shape (polyhedron) ends in -hedron, just like any 2D shape (polygon) ends in -gon, and octa- means 8.
Octahedron
octahedron
cube
8
A OctahedronThis shape has 8 faces.
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Octahedron
A cube is one
It is an octahedron that is a 3D shape with 8 faces
An octahedron is a 3D shape with 8 sides.