8 sides because a normal square has 4 times it by 2 is 8
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A square-based pyramid.
A 3D square is known as a cube if all it's sides are perfect squares. If they were rectangles it would be known as a cuboid.
cube
I would say a square-based pyramid but there are many 3 dimensional shapes with 5 sides.* * * * *The generic name is a pentahedron.
they are both 3D. four sides