degrees | | an angle with a measure greater than 90 degrees and less than 180 degrees |

perpendicular line | | a specific location in space with no size or shape |

congruent angles | | a straight path |

plane | | two lines that intersect to form a right angle |

supplementary angle | | angles that have the same measure |

protractor | | an angle with a measure greater than 0 degrees and less than 90 degrees |

point | | the sum total of these angle measures is 180 degrees |

skew line | | unit of measurement for angles |

straight angle | | the sum total of these angle measures is 90 degrees |

vertical angle | | tool used to make linear measurements |

ray | | two lines with no point of intersection |

right angle | | the common endpoint of two rays that form an angle |

adjacent angle | | a portion of a line that extends from one point infinitely in one direction |

vertex | | an angle that measure 90 degrees |

parallel line | | opposite angles formed by the intersection of two lines |

complementary angle | | an angle with a measure of exactly 180 degrees |

ruler | | tool used to measure angles |

angle | | a flat surface with no edges or boundaries |

acute angle | | two angles that have a common side and the same vertex, but do no overlap |

obtuse angle | | two rays with a common endpoint |

line | | two lines that do not intersect and are not in the same plane |

line segment | | part of a line containing two endpoints and all points between the endpoints |