Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Ch.1 Geometry Vocab

### Basic Vocabulary for Chapter 1 of Geometry

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

point | A location with neither shape nor size |

line | Made up of points and has no thickness or width |

plane | flat surface made up of points that extend infinitely in all directions |

collinear points | points that lie on the same line |

coplanar points | points that lie in the same plane |

line segment | Can be measured and has two endpoints |

ray | part of a line that extends infinitely in one direction |

opposite rays | two rays determined by a point on a line |

intersection | two or more geometric figures is the set of points that they have in common |

postulate | describes a fundamental relationship between the basic terms of geometry |

distance between two points on a line | length of the segment with those points as endpoints |

angle | formed by two noncollinear rays that have a common endpoint |

acute angle | angle measurement is less that 90 degrees |

obtuse angle | Angle measurement is over 90 degrees |

right angle | angle measurement is exactly 90 degrees |

straight angle | same as straight line; angle measurement is exactly 180 degrees |

congruent angles | two or more angles that measure the same length |

supplementary angles | Two angles with measures that have a sum of 180 degrees |

angle bisector | A ray that divides an angle into two congruent angles |

complementary angles | Two angles with measures that have a sum of 90 degrees |

adjacent angles | two angles that lie in the same plane, have a common vertex and a common side, but no common interior points |

linear pair | A pair of adjacent angles whose noncommon sides are opposite rays |

vertical angles | Two nonadjacent angles formed by two intersecting lines |

polygon | A closed figure formed by a finite number of coplanar segments called sides |

convex polygon | A polygon for which there is no line that contains both a side of the polygon and a point in the interior of the polygon |

concave polygon | A polygon for which there is a line containing a side of the polygon that also contains a point in the interior of the polygon. |

n-gon | A polygon with n sides |

equilateral polygon | A polygon with all equal sides |

equiangular polygon | A polygon with all angles that are equal |

regular polygon | A polygon with both sides and angles equal |

Created by:
Katrina1212