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# Geometry-Characteris

### SSC Math 8 Geometry-Characteristics

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

Triangle Sum Theorem | The theorem that states that the measures of the angles in a triangle add up to 180 degrees |

Parallel lines | Lines in a plane that do not intersect |

Transversal | a line that intersects two or more lines |

Corresponding Angles | For two lines intersected by a transversal, a pair of angles that lie on the same side of the transversal and on the same sides of the other two lines. |

Alternate Interior Angles | For two lines intersected by a transversal, a pair of nonadjacent angles that lie on opposite sides of the transversal and between the other two lines |

Alternate Exterior Angles | For two lines intersected by a transversal, a pair of angles that lie on opposite sides of the transversal and outside the other two lines |

Vertical Angles | A pair of opposite congruent angles formed by intersecting lines |

Supplementary Angles | Two angles whose measures have a sum of 180 degrees |

Complementary Angles | Two angles whose measures have a sum of 90 degrees |

Acute Angle | An angle that measures greater than 0 degrees and less than 90 degrees |

Obtuse Angle | An angle whose measure is greater than 90 degrees but less than 180 degrees |

Right Angle | An angle that measures 90 degrees |

Straight Angle | An angle that measures 180 degrees |

Adjacent Angles | Angles in the same plane that have a common vertex and a common side |

Angle | A figure formed by two rays with a common endpoint called the vertex |

Congruent Angles | Angles that have the same measure |

Perpendicular Lines | Lines that intersect to form right angles |

Created by:
heather.lander