\begin{definition}[Definition:Rhodonea Curve]
A '''rhodonea curve''' is a curve defined by either one of the polar equations:
{{begin-eqn}}
{{eqn | l = r
      | r = a \cos n \theta
}}
{{eqn | l = r
      | r = a \sin n \theta
}}
{{end-eqn}}
It consists of a number of loops meeting at a central point.
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\end{definition}