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# Geometry VocabUnit 1

### Honors Geometry

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

___ is the set of all points | space |

____ is a location in space that has no size or dimension. It is usually represented by a dot. | point |

A ___ is a series of points that extend in opposite directions without an end. Lines are one dimension. It is usually represented by a straight line with two arrowheads to indicate that the line extends without end in two directions. | line |

A ____ is a flat surface with no thickness. | plane |

______ are points that lie on the same line. | collinear |

____ are points that lie on the same plane. | coplanar |

_____ is a part of a line consisting of two endpoints and all the points between. | segment |

____ is part of a line with one endpoint. | ray |

_____ is two collinear rays with the same endpoint. | opposite rays |

____ are coplanar lines that never intersect. | parallel |

_____ are non-coplanar lines that never intersect. | skew |

_____ are coplanar lines that intersect to form right angles. | perpendicular lines |

____ are planes that do not intersect. | parallel planes |

_____ are two different rays that have the same initial point. | angles |

____ are angles that have the same measure. | congruent angles |

______ is a ray that divides an angle into two congruent angles. | angle bisector |

______ is two angles whose sides form opposite rays. | vertical angles |

______ is two coplanar angles with a common side and vertex, but no common interior points. | adjacent angles |

______ is two angles whose sum is 180. | supplementary |

______ is two angles whose sum is 90. | complementary |

________ is two adjacent angles whose non-common sides form opposite rays. | linear pair |

_____ are rules that are accepted without proof. | postulate |

______ are rules that are proved. | theorems |

_____ is a line that intersects two coplanar lines at two distinct points | transversal |

a(n) ______ angle is less than 90. | acute |

a(n) ______ angle is equal to 90. | right |

a(n) ______ angle is equal to 180. | straight |

a(n) ______ angle is greater than 180. | obtuse |

______ is a point that divides a segment into two congruent segments. | midpoint |

______is a line, segment, or ray that intersects a segment at its midpoint | segment bisector |

___is a line, segment, or ray that is perpendicular to a segment at its midpoint. | perpendicular bisector |

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