\begin{definition}[Definition:Euclid's Definitions - Book III/8 - Angle in Segment]
{{EuclidSaid}}
:''An '''angle in a segment''' is the angle which, when a point is taken on the circumference of the segment and straight lines are joined from it to the extremities of the straight line which is the base of the segment, is contained by the straight lines so joined.''
{{EuclidDefRef|III|8|Angle in Segment}}
\end{definition}