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# Math Vocab Test

### Chapter 4

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

Triangle | is a polygon with three sides |

Interior Angle | the original angles are the interior angles |

Exterior Angles | The angles that form linear pairs with the interior angles are this |

Corollary to a theorem | is a statement that can be proven easily using a the theorm |

Scalene Triangle | triangle that doesn't have any equal sides |

Isosceles Triangle | triangle that has 2 equal sides |

Equilateral Triangle | triangle that has 3 equal sides |

Acute Triangle | Triangle that has 3 acute angles |

Right Triangle | triangle that has 1 right angle |

Obtuse Triangle | triangle that has 1 obtuse angle |

Equiangular Triangle | triangle that has all angles equal |

Congruent figures | Have congruent parts; exactly equal in size and shape |

Corresponding parts | parts (angles or sides) are in the same relative position each of the figures |

Leg of a right triangle | Two sides that form a right triangle |

Hypotenuse | the sides adjacent to the right triangle |

Flow Proof | this proof format shows the structure of a proof using boxes and connecting arrows |

Transformation | is an operation that moves or changes a geometric figure in someway to produce new figure |

Image | new figure is called this |

Translation | moves every point of a figure the same distance in the same direction |

Reflection | uses a line of reflection to create a mirror image of the original image |

Rotation | turned a figure about a fixed point called the center of rotation |

Congruence transformation | changes the position of the figure without changing its size or shape |