A regular Undegon (11 sided polygon) has 11 lines of symmetry. It also has an order of rotation symmetry of 11.
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No because the closest polygon sum is 1620 which is the hendecagon the eleven sided polygon
The name of a 150 sided polygon is Hectapentacontagon.
a nonagon is the name given to a nine sided polygon
there are 15 triangles in a 17 sided polygon
The name of a 11 sided polygon is Hendecagon.