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# Geometry

### Vocabulary

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

Point | An undefined term thought as a location with no size or dimension |

Line | An undefined straight, continuous arrangement of infintely many points extending forever in two directions. A line has length, but no width or thickness, so it is one-dimensional |

Plane | A flat surface that extends forever. It has infinite length and width but no thickness |

Line Segment | Two points and all the points between them that are collinear with the two points |

Collinear | Points that lie on the same line |

Coplanar | Points that lie on the same plane |

Ray | A point on a line,and all of the points of the line that lie on one side of the endpoint |

End points | The point at either end of a segment or the first point of a ray |

Oppsoite Rays | Collinear rays with the same endpoint |

Intersection | The set points that objects have in common |

Congruent | Objects that have the same measure |

Bisect | To divide into two congruent parts |

Midpoint | An object that intersects a segment into two congruent segments (bisector) |

Angle | An object formed by two rays with the same endpoint |

Vertex | The commom endpoint in an angle |

Angle Bisector | An object that divides an angle into two congruent angles |

Straight Angle | An angle with a measure of 180 degrees. (straight line) |

Obtuse Angle | An angle with a measure of 90 degrees and 180 degrees |

Right Angle | An angle with a measurement of 90 degrees |

Acute Angle | An angle with a measurement less than 90 degrees |

Complementary | Two angles whose sum is 90 degrees |

Supplementary | Two angles whose sum is 180 degrees |

Adjacent Angles | Angles that have a common side and a common vertex, but no common interior points |

Vertical Angles | Two angles whose sides form two pairs of opposite rays |

Created by:
Carlos_F