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polygons ![click to hear : polygons click to hear : polygons](../../../images/speaker-vert.gif)
Geometric plane figures with several sides and a number of equal angles.
regular hendecagon ![click to hear : regular hendecagon click to hear : regular hendecagon](../../../images/speaker-vert.gif)
Polygon with 11 (hendeca = eleven) sides and equal angles.
regular dodecagon ![click to hear : regular dodecagon click to hear : regular dodecagon](../../../images/speaker-vert.gif)
Polygon with 12 (dodeca = twelve) sides and equal angles.
regular decagon ![click to hear : regular decagon click to hear : regular decagon](../../../images/speaker-vert.gif)
Polygon with 10 (deca = ten) sides and equal angles.
regular nonagon ![click to hear : regular nonagon click to hear : regular nonagon](../../../images/speaker-vert.gif)
Polygon with nine (nona = nine) sides and equal angles.
regular octagon ![click to hear : regular octagon click to hear : regular octagon](../../../images/speaker-vert.gif)
Polygon with eight (octo = eight) sides and equal angles.