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# Math Vocabulary

### Chapter 19, Part 1

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

point | an exact location in space |

line segment | a part of a line that includes two points called endpoints and all the points between them |

endpoint | the point at either end of a line segment or the starting point of a ray |

line | a straight path of points that continues without end in both directions with no endpoints |

ray | part of a line that has no endpoint and continues without end in one direction |

plane | a flat surface that continues without end in all directions |

dimension | a measurement along a straight line of length, width, or height of a figure |

one-dimensional | a measure in only one direction, such as length |

two-dimensional | a measure in two directions, such as length and width |

angle | a figure formed by two line segments or rays that share an endpoint |

vertex | the point at which two rays of an angle meet or two (or more) line segments meet in a plane figure, or where three or more edges meet in a solid figure; the top point of a cone |

degree (°) | the unit used for measuring angles and temperatures |

protractor | a tool for measuring the size of an angle |

right angle | an angle that forms a square corner and has a measure of 90 degrees |

acute angle | an angle that measures greater than 0 degrees and less than 90 degrees |

straight angle | an angle whose measure is 180 degrees |

obtuse angle | an angle that measures greater than 90 degrees and less than 180 degrees |

Created by:
RossCoops3