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# Geometry Ch. 4 vocab

### TRIANGLES!!!!

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

Triangle | An polygon with three sides. Classified by sides: Scalene, Isosceles, Equilateral. Classified by angles: Acute, Right, Obtuse. |

Interior Angles | The three angles on the interior of an polygon. They add up to 180 degrees. |

Exterior Angles | Six angles formed by extending the sides of an polygon. |

Congruent Figures | All the parts of an figure are congruent to the corresponding parts of another figure. |

Corresponding Parts | Parts of two figures that correspond to another. |

Legs of a Right Triangle | In an right triangle, the sides adjacent to the right angle. |

Hypotenuse | The side opposite to the right angle. It is longer than the legs. |

Flow Proof | Uses boxes/bubbles and arrows to show the flow of a logical argument. The reasons are below the statement they justify. |

Legs | In an isosceles triangle, the two congruent sides. |

Vertex Angle | The angle formed by the two legs of a isosceles triangle. |

Base | The third side of a isosceles triangle. |

Base Angles | The two angles formed by the legs and base of a isosceles triangle. These are congruent to each other. |

Transformation | A operation that moves or changes a geometric figure in some way to produce a new figure. |

Image | The new figure resulting from an transformation. |

Translation | WORDSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS about math! |

Reflexion | MIRRORZZZZ |

Rotation | SWIRLY Q. spiral movement. |

Congruence Transformation | I could not find this definition in the chapter and was not in the mood to look in the glossary in the back of the book. There is eight subsections in this chapter which i think is nine more than there should be. |

Created by:
jmclaughlin