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# Angle Terms

### Chapter 9

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

Acute | An angle measuring between 0 and 90 degrees. |

Right | An angle measuring exactly 90 degrees |

Obtuse | An angle measuring between 90 and 180 degrees. |

Straight | An angle measuring exactly 180 degrees. |

Complementary | 2 angles whose sum measures 90 degrees |

Supplementary | 2 angles whose sum measures 180 degrees |

Adjacent | 2 angles that share a common side and a common vertex |

Vertical | 2 angles formed by intersecting lines. The two angles are opposite each other and equal to each other. |

Parallel | Two straight lines that do not intersect. |

Perpendicular | Two lines that intersect at a right angle. |

180 degrees | The sum of the angle measurements of a triangle. |

Triangle | A closed shape with 3 sides and 3 angles. |

Acute Triangle | A triangle with 3 acute angles |

Right Triangle | A triangle with ONE right angle |

Obtuse Triangle | A triangle with an obtuse angle. |

Equilateral Triangle | A triangle with 3 equal length sides. |

Isosceles Triangle | A triangle with 2 equal length sides. |

Scalene Triangle | A triangle with no equal length sides. |

Created by:
cayucosmath