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# Geo_2.2

### Vocabulary for Geometry_2.2

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

AAS Postulate | If two angles and the nonincluded side of one triangle are congruent to the corresponding two angles and side of a second triangle, then the two triangles are congruent. |

ASA postulate | If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent. |

base angles | The angles opposite the congruent sides of an isosceles triangle. |

congruent polygon | Polygons in which all matching parts are congruent. |

congruent | Having the same measure. |

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

corresponding parts | Matching parts of congruent polygons. |

CPCTC | Corresponding Parts of Congruent Triangles are congruent, or CPCTC. |

included angle | In a triangle, the angle formed by two sides is the included angle for those two sides. |

included side | The side of a polygon that is a side of each of two angles. |

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

legs of an isosceles triangle | The two congruent sides of an isosceles triangle. |

SAS Postulate | If two sides and the included angle of one triangle are congruent to two sides and the included angle of a second triangle, then the triangles are congruent. |

SSS Postulate | If three sides of one triangle are congruent to three sides of a second triangle, then the triangles are congruent. |

vertex angle | The angle formed by the two congruent sides of an isosceles triangle. |

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mtoepper