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# "Reason" Words

### Geometric Proof

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

Bisect | To cut down the middle, split in half, both smaller pieces are congruent. |

Congruence | The exact same |

Definition of Congruence | allows you to switch the sign between equal and congruence |

Midpoint | To cut down the middle, split in half, both smaller pieces are congruent. |

Linear Pair | two angles that are adjacent and supplementary. (two angles touching on a line) |

Linear Pair Theorem | If angles are a linear pair, then they are supplementary |

Supplementary | Adds to 180 |

Angle Addition Postulate | the measure of the larger angle is the sum of the measures of the two smaller ones. (little plus little equals big) |

Segment Addition Postulate | the measure of the larger segment is the sum of the measures of the two smaller ones. (little plus little equals big) |

Perpendicular lines | Two lines that form 90 angles |

Parallel Lines | two lines that never intersect |

Right Angles | 90 degrees |

Vertical Angles | each of the pairs of opposite angles made by two intersecting lines (always congruent) |

Substitution | Replace one value with an equivalent value |

Addition, Subtraction, Multiplication, Division Property of Equality | The operation is performed on both sides of the equal sign |

Reflexive | Exact same on both sides of the equal or congruence sign |

Symmetric | Flip the equation around |

Transitive | If 2 things are equal to A, then the two things are equal to each other |

Simplify | Combine like terms or anything you can type into the calculator |

Created by:
cdyson