I would guess it is a pyramid that has a seven-sided polygon as its base.
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if its a four sided pyramid then four. if its a three sided pyramid then four.
A hexagonal pyramid
depends what kind of pyramid, if its a four sided pyramid then its the same but if its a three sided pyramid then the triangular prism has more
hexagonal pyramid
the smooth-sided is smooth but the stepped has a six huged steps at the top for the robbers