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A hendecagon (also undecagon) is a polygon with eleven edges and eleven angles.
A hendecagon is a regular 11-sided polygon, the angles of which are all 147.27(recurring) degrees. With 11 sides there will be 11 angles, so 147.27 * 11 = 1620 degrees.
Hendecagon
The hendecagon is a polygon with eleven sides.
A hendecagon can have upto 5 pairs of parallel lines.