I assume that, by "Loonie", you mean the Canadian coin.
Strictly speaking, it is not a polygon because its sides are not straight lines but if they were, it would be a regular hendecagon - an 11-sided regular polygon.
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It is not a polygon, because a polygon is a closed figure.
It is a concave or reentrant polygon.
what is 12 different kind of polygon
no
It is a regular polygon as for example an equilateral triangle