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# CH 1/2 terms

### definitions, postulates, and theoroms

Term | Definition |
---|---|

congruent segments | segments if AB=BC then AB is congruent to BC |

definition of midpoint | If B is the midpoint of AC, then AB is congruent to BC |

segment bisector | if line l bisects ACM at B then B is the midpoint of AC and AB is congruent to BC |

congruent angles | if A=B then A is congruent to B |

vertical angles | if 1 and 2 are vertical angles and 3 and 4 are vertical angles |

right angles | if S is a right angle then S=90 |

linear angles | 1 and 2 are linear angles |

complementary angles | If 1 and 2 are complementary angles, then 1 + 2=90 |

Supplementary angles | If 1 and 2 are complementary angles, then 1 + 2=180 |

angle bisector | if AY bisects XAY then XAY is congruent to YAZ |

perpendicular lines | if AB is perpendicular to CD then they form right angles |

perpendicular bisector | If EF is perpendicular to bisector of GH then GJ is congruent to JH and EJG is a right angle. |

segment addition postulate | AB+BC=AC |

angle addition postulate | AOB+BOC=AOC |

linear pair postulate | if 1 and 2 are linear pairs then they are supplementary |

Vertical angles theorem | If 1 and 2 are vertical angles then 1 and 2 are congruent |

Congruent supplements theorem | if 1 and 3 are supplementary and 2 and 3 are supplementary then 1 and 2 are congruent |

Congruent complements theorem | IF 1 and 2 are complementary and 3 and 2 are complementary then 1 and 3 are congruent |

All right angles are congruent | If 1 and 2 are right angles then 1 and 2 are congruent |

Created by:
carolinelewis12