\begin{definition}[Definition:Cube/Geometry]
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A '''cube''' is a hexahedron whose $6$ faces are all congruent squares.
{{EuclidSaid}}
:''{{:Definition:Euclid's Definitions - Book XI/25 - Cube}}''
{{EuclidDefRefNocat|XI|25|Cube}}
It has:
:$8$ vertices
:$12$ edges
:$6$ faces
\end{definition}