undecagon

the undecagon has eleven sides.

in geometry, an undecagon is a polygon with eleven edges.

we studied the properties of an undecagon in class.

an undecagon can be regular or irregular.

drawing an undecagon requires careful measurement.

in art, an undecagon can create interesting patterns.

the undecagon's angles add up to 1800 degrees.

architects sometimes use undecagons in their designs.

understanding an undecagon helps in learning advanced geometry.

one can find undecagons in various mathematical puzzles.