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# TriangleRelation

### Created for SEED 3702 by Mark

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

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

If a triangle is a right triangle then the acute angles are | complementary |

If two angles are congruent and _______ then each is a right angle. | supplementary |

Triangle Inequality Theorem | The sum of the lengths of any two sides of a triangle is greater than the length of the third side. |

Triangle Angle-Sum Theorem | The sum of the measures of the angles of a triangle is 180 |

Side-Side-Side Theorem (SSS) | If the three sides of a triangle are congruent to the three sides of another triangle then the triangles are congruent. |

Side-Angle-Side Postulate | If two sides and an included angle of a triangle are congruent to two sides and an included angle of another triangle then the triangles are congruent. |

Definition of a Triangle | The union of three segments determined by three non-collinear points. |

Angle-Angle Postulate (Leads to Isosceles Triangle Theorem) | If any two angles of a triangle are congruent to the corresponding angles in another triangle the triangles are congruent. |

Angle-Angle-Side Theorem (AAS). | If two angles and an excluded side are congruent to the corresponding angles and side of another triangle then the triangles are congruent. |

Created by:
MarkJonasson