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# Geometric Figures

### Vocabulary for Geometric Figures Unit Grade 7

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

Acute Angle | An angle that measures less than 90 degrees, but greater that 0 degrees. |

Adjacent Angles | Two angles created by intersecting lines and share a common ray. |

Angle | Two rays that meet at a common point. |

Complementary Angles | A pair of angles whose sum is 90 degrees. |

Congruent Angles | Two angles that have equal degree measure. |

Corresponding Angles | Angles that are in the same positions of different intersections created by a transversal intersecting two or more parallel lines. |

Equilateral Triangle | A triangle that has all sides of equal length. |

Intersecting Lines | Two lines that meet at a point. |

Isosceles Triangle | A triangle that has at least two sides of equal measure. |

Line | A one dimensional figure that does on forever in two directions. |

Line Segment | A one dimensional figure with two endpoints. |

Acute Triangle | A triangle that has three acute angles. |

Obtuse Angle | An angle that measures greater than 90 degrees, but less than 180 degrees. |

Obtuse Triangle | A triangle that has one obtuse angle. |

Parallel Lines | Two lines that in the same plane that will never intersect. |

Perpendicular Lines | Two lines that intersect forming four right angles. |

Plane | A two dimensional (flat) surface that extends forever. |

Point | An exact location in space. |

Ray | A one dimensional figure that has one endpoint and goes on forever in one direction. |

Right Angle | An angle that measures exactly 90 degrees. |

Right Triangle | A triangle that has one 90 degree angle. |

Scalene Triangle | A triangle that has no sides of equal length. |

Straight Angle | An angle that measures exactly 180 degrees. |

Supplementary Angles | A pair of angles whose sum is 180 degrees. |

Transversal | A line that cuts through two or more parallel lines. |

Vertical Angles | Two angles created by intersecting lines that are equal in measure, but do not share a common ray. |

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EYLERB106