Definition/Meaning | Word/Phrase |
---|---|

polygon such that there is a straight line that cuts it in four or more points | concave polygon |

polygon such that no side extended cuts any other side or vertex; it can be cut by a line in at most two points | convex polygon |

polyhedron any plane section of which is a convex polygon | convex polyhedron |

polygon with 10 sides and 10 angles | decagon |

polygon, ten-sided | decagon |

(geometry) a straight line connecting any two vertices of a polygon that are not adjacent | diagonal |

twelve-sided polygon | dodecagon |

polygon, twelve-sided | dodecagon |

three-sided regular polygon | equiangular triangle , equilateral triangle |

supplement of an interior angle of a polygon | exterior angle , external angle |

(geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon | foursquare , square |

seven-sided polygon | heptagon |

polygon, seven-sided | heptagon |

six-sided polygon | hexagon |

polygon, six-sided | hexagon |

six-sided polygon | hexagon |

regular polygon formed by extending each of the sides of a regular hexagon to form two equilateral triangles | hexagram |

angle inside two adjacent sides of a polygon | interior angle , internal angle |

equiangular polygon | isogon |

nine-sided polygon | nonagon |

Copyright © 2015 Dictionary.com, LLC. All rights reserved.