Meaning | A closed plane figure bounded by straight sides. |
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Synonym | polygonal shape |
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Narrower | concave polygon | A polygon such that there is a straight line that cuts it in four or more points |
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convex polygon | A polygon such that no side extended cuts any other side or vertex |

decagon | A polygon with 10 sides and 10 angles |

dodecagon | A twelve-sided polygon |

heptagon | A seven-sided polygon |

hexagon | A six-sided polygon |

isogon | An equiangular polygon |

nonagon | A nine-sided polygon |

octagon | An eight-sided polygon |

pentagon | A five-sided polygon |

quadrilateral, quadrangle, tetragon | A four-sided polygon |

spherical polygon | A figure on the surface of a sphere bounded by arcs of 3 or more great circles |

triangle, trigon, trilateral | A three-sided polygon |

undecagon | An eleven-sided polygon |

Broader | plane figure, two-dimensional figure | A two-dimensional shape |
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Spanish | forma poligonal, polígono |
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Catalan | forma poligonal, polígon |
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Adjectives | polygonal | having many sides or relating to a surface marked by polygons |
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