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# Geometry (H) C01-L4

### Wirtz Combined Geometry Chapter 1 Lesson 4

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

angle (p17) | A figure formed by two rays that have the same endpoint. |

sides (p17) | The two rays of an angle. |

vertex (p17) | The common endpoint of two rays of an angle |

acute angle (p17) | An angle with measure between 0 and 90. |

right angle (p17) | An angle with measure 90. |

obtuse angle (p17) | An angle with measure between 90 and 180. |

straight angle (p17) | An angle with measure 180. |

Congruent angles (p19) | Angles that have equal measures. |

adjacent angles (p19) | Two angles in a plane that have a common vertex and a common side but no common interior points. |

bisector of an angle (p19) | The ray that divides the angle into two congruent adjacent angles. |

Angle Addition Postulate 1 (p18) | If point B lies in the interior of angle AOC, then the measure of angle AOB plus the measure of angle BOC is equal to the measure of angle AOC. |

Angle Addition Postulate 2 (p18) | If angle AOC is a straight angle and B is any point not on line AC, then the measure of angle AOB plus the measure of angle BOC equals 180. |

Created by:
shelley.wirtz