\begin{definition}[Definition:Inscribe/Circle in Polygon]
A circle is '''inscribed in''' a polygon when it is tangent to each of the sides of that polygon:
:300px
{{EuclidSaid}}
:''{{:Definition:Euclid's Definitions - Book IV/5 - Circle Inscribed}}''
{{EuclidDefRefNocat|IV|5|Circle Inscribed}}
\end{definition}