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# Chapter 3 Geometry

### Math

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

Definition of Parallel Lines | 2 lines are parallel iff they lie in the same plane and do not intersect line AB // line DC |

Definition of Skew Lines | 2 lines are skew iff they do not lie in the same plane and do not intersect |

Definition of Parallel Planes | 2 planes are // iff they do not intersect |

Definition Parallel Segments or Rays | segments or rays are parallel iff the lines that contain them are parallel |

If 2 parallel planes are intersected by a third plane, then _____________ | the lines of intersection are parallel |

Defintion of Transversal | a line is a transversal iff it intersects 2 or more coplanar lines at different points |

interior angles exterior angles corresponding angles alternate interior angles alternate exterior angles same side interior angles | angle 3, angle 4, angle 5, angle 6 angle 1, angle 2, angle 7, angle 8 angle1&angle5 angle2&angle6 angle3&angle7 angle4&angle8 angle 3 &angle 6 angle 4 & angle 5 angle 1& angle 8 angle 2 & angle 7 ang. 3 & ang. 5 ang. 4 & an |

If 2 // lines have a transversal, then __________ | corresponding angles are congruent alt. int. angles are congruent alt. ext. angles are congruent |

If 2// lines have a transversal, then SSI angles are __________ (SSE) | supplementary |

If a transversal intersecting 2// lines is perpendicular to one of the lines it is _______________ | also perpendicular to the other line |

Through a point not on the line, there is exactly one line ________ to the given line. | parallel |

If 2 lines have a transversal and a pair of congruent corresponding angles then __________ (alt. ext, alt int.) | the lines are parallel |

If 2 lines have interior angles(exterior angles) on the same side of the transversl that are _____ then _______ | supplementary then the lines are parallel |

If 2 coplanar lines are perpendicular to the same line, then _______ | they are parallel |

If 2 lines are parallel to a 3rd line, then ___________ | they are perpendicular to each other |

Created by:
Mickeyjump