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# Howard Geometry 6

### Chapter 6 Geometry Vocabulary

Question | Answer |
---|---|

Triangle | A polygon with three sides |

Quadrilateral | A polygon with four sides |

Pentagon | A polygon with five sides |

Hexagon | A polygon with six sides |

Heptagon | A polygon with seven sides |

Octagon | A polygon with eight sides |

Nonagon | A polygon with nine sides |

Decagon | A polygon with ten sides |

Diagonal | A segment that connects two non-adjacent vertices of a polygon |

Legs | The nonparallel sides of a trapezoid |

Bases | The parallel sides of a trapezoid |

Trapezoid | A quadrilateral with only one pair of parallel sides |

Vertex | The point where two sides of a polygon meet |

Rectangle | A parallelogram with four right angles |

Rhombus | A parallelogram with four congruent sides |

Square | A polygon that is both a rhombus and a rectangle |

Isosceles Trapezoid | A trapezoid with 2 congruent legs |

Equilateral | A polygon with all congruent sides |

Equiangular | A polygon with all congruent angles |

Regular | A polygon with all congruent angles and sides |

Concave | A polygon that is not convex; it appears to have a dent in it |

Convex | A polygon where no line that contains a side of the polygon that passes through the interior of the polygon |

Exterior angles of a polygon or Interior angles of a quadrilateral | 360 degrees |

Interior angles of a triangle | 180 degrees |

Interior angles of any polygon | (number of sides - 2) x 180 |

Polygon | A figure that is 1) flat 2) closed 3) formed by 3 or more straight sides |

Side | A segment that form a polygon |

Parallelogram | A quadrilateral formed by two pairs of parallel sides |

Midsegment | A segment formed by connecting the midpoints of the legs of a trapezoid; it is parallel to the bases |

Interior Angles | The angles on the inside of a polygon |

Exterior Angles | The angles formed on the outside of a polygon by extending the sides of a polygons into rays |

Base Angles | Angles formed between the base and leg of a trapezoid |

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HowardGeometry