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# Bradfield Geom Ch 4

### Geometry Congruent triangles

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

Third Angle Theorem | If two angles of one triangle are congruent to two angles of another triangle, then the third angles are congruent. |

legs of an isosceles triangle | the congruent sides of an isosceles triangle |

base of an isosceles triangle | The non-congruent side of an isosceles triangle |

Vertex Angle of an isoscels triangle | the angle formed by the two congruent sides of an isosceles triangle |

Base Angles of an isosceles triangle | The congruent angles adjacent to the base of an isosceles triangle. |

Isosceles Triangle Theorem | If two sides of a triangle are congruent, then the angles opposite those sides are congruent. |

Theorem: Equilateral triangles | The angles of an equilateral triangle are all 60 degrees. |

Hypotenuse of a triangle | The longest side of a right triangle. |

Legs of a triangle | The two sides of the right triangle other than the hypotenuse. These sides form the right angle. |

Scalene triangle | A triangle with no congruent sides |

Isosceles Triangle | A triangle with 2 congruent sides |

Equilateral triangle | A triangle with THREE congruent sides |

Acute triangle | A triangle with 3 acute angles |

Obtuse triangle | A triangle with ONE obtuse angle |

Right triangle | A triangle with ONE right angle |

Equiangular triangle | A triangle with 3 congruent angles (all are 60 degrees) |

Perpendicular bisector | a line that is perpendicular to a segment and goes through its midpoint(bisects the segment) |