In
geometry, a hendecagram (also endecagram or endekagram) is a
star polygon
In geometry, a star polygon is a type of non-convex polygon. Regular star polygons have been studied in depth; while star polygons in general appear not to have been formally defined, certain notable ones can arise through truncation operations ...
that has eleven
vertices.
The name ''hendecagram'' combines a Greek
numeral prefix, ''
hendeca-'', with the
Greek suffix ''
-gram
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